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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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SKILL.md(原文)

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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, or code_challenge
  • Mobile or SPA clients rely on OAuth or OIDC flows

For token cryptography and JWT header abuse, also load:

2. HIGH-VALUE MISCONFIGURATION CHECKS

ThemeWhat to Check
state handlingmissing, static, predictable, or not bound to user session
redirect_uri validationprefix match, open redirect chaining, path confusion, localhost leftovers
PKCEmissing for public clients, code verifier not enforced, downgraded flow
OIDC noncemissing or not validated on ID token return
token audience and issuerweak aud / iss checks, cross-client token reuse
account bindingcallback binds attacker identity to victim session
scope handlingbroader scopes granted than the user or client should receive

3. QUICK TRIAGE

  1. Map the full flow: authorize, callback, token exchange, logout.
  2. Replay callback flows with altered state, nonce, and redirect_uri.
  3. Compare SPA, mobile, and web clients for weaker validation.
  4. Check whether one provider account can be rebound to another local account.

4. RELATED ROUTES

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

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