oauth-oidc-misconfiguration
OAuth and OIDC misconfiguration testing playbook. Use when reviewing redirect URI handling, state and nonce validation, PKCE, token audience, callback binding, and identity-provider trust flaws.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/yaklang/hack-skills --skill oauth-oidc-misconfiguration- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads oauth-oidc-misconfiguration automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
SKILL: OAuth and OIDC Misconfiguration — Redirects, PKCE, Scopes, and Token Binding
AI LOAD INSTRUCTION: Use this skill when the target uses OAuth 2.0 or OpenID Connect and you need a focused misconfiguration checklist: redirect URI validation, state and nonce handling, PKCE enforcement, token audience, and account binding mistakes.
1. WHEN TO LOAD THIS SKILL
Load when:
- The app supports
Login with Google, GitHub, Microsoft, Okta, or other IdPs - You see
authorize,callback,redirect_uri,code,state,nonce, orcode_challenge - Mobile or SPA clients rely on OAuth or OIDC flows
For token cryptography and JWT header abuse, also load:
- jwt oauth token attacks
2. HIGH-VALUE MISCONFIGURATION CHECKS
| Theme | What to Check |
|---|---|
state handling | missing, static, predictable, or not bound to user session |
redirect_uri validation | prefix match, open redirect chaining, path confusion, localhost leftovers |
| PKCE | missing for public clients, code verifier not enforced, downgraded flow |
OIDC nonce | missing or not validated on ID token return |
| token audience and issuer | weak aud / iss checks, cross-client token reuse |
| account binding | callback binds attacker identity to victim session |
| scope handling | broader scopes granted than the user or client should receive |
3. QUICK TRIAGE
- Map the full flow: authorize, callback, token exchange, logout.
- Replay callback flows with altered
state,nonce, andredirect_uri. - Compare SPA, mobile, and web clients for weaker validation.
- Check whether one provider account can be rebound to another local account.
4. RELATED ROUTES
- CORS or cross-origin token exposure: cors cross origin misconfiguration
- XML federation or enterprise SSO: saml sso assertion attacks
- CSRF-heavy login or binding bugs: csrf cross site request forgery
FAQ
What does the oauth-oidc-misconfiguration skill do?
OAuth and OIDC misconfiguration testing playbook. Use when reviewing redirect URI handling, state and nonce validation, PKCE, token audience, callback binding, and identity-provider trust flaws.
How do I install oauth-oidc-misconfiguration?
Run npx skills add https://github.com/yaklang/hack-skills --skill oauth-oidc-misconfiguration in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/oauth-oidc-misconfiguration/ (personal) or .claude/skills/oauth-oidc-misconfiguration/ (project).
Which AI agents can use oauth-oidc-misconfiguration?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is oauth-oidc-misconfiguration safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains oauth-oidc-misconfiguration?
It is published by yaklang in yaklang/hack-skills. It has 3,698 recorded installs.
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