Individual skill
oauth-oidc-security
OAuth 2.0 and OpenID Connect implementation testing — redirect URI validation bypass, PKCE enforcement and downgrade, state/CSRF, code replay, token audience and scope abuse, and ID token validation flaws
internal/tools/skills/data/api-security/oauth-oidc-security/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
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Repository context
- Repository stars (not skill ratings)
- 1,320
- Repository last updated
- Nov 8, 2026
- License
- Apache-2.0
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- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- security Derived category
- testing Derived category
- security-application Derived category
Files and excerpt
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# OAuth & OIDC Implementation Testing
## Purpose
Exploit flawed OAuth 2.0/OIDC implementations: redirect manipulations that steal authorization codes, missing PKCE, replayable codes, cross-client token reuse, and unvalidated ID tokens — each confirmed by obtaining usable credentials for a victim context.
## Preconditions
- The target's OAuth flow exercised end-to-end at least once (all four legs observed)
- A test client registration if available; otherwise attacker-side infrastructure to receive redirects (OOB callback domain)
- Understanding of which grant types are in play (code, implicit, ROPC, device)
## Attack Surface Signals
- `/authorize`, `/token`, `/introspect`, `/userinfo`, `.well-known/openid-configuration`
- redirect_uri handling in the authorize request
- state, nonce, code_challenge parameters