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Auth audit

Skill fusengine/agents/plugins/security-expert/skills/auth-audit

Audit authentication and authorization patterns. Checks JWT, sessions, OAuth2, PKCE implementations for security best practices and common vulnerabilities. Use when: auditing JWT, session, OAuth2/PKCE, password, or MFA implementations for security vulnerabilities.From its SKILL.md

Install
npx -y skills add fusengine/agents --skill auth-audit

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

  • 22 stars22 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

SKILL.md

1.4 KB, 247 tokens by cl100k_base, as published. Nobody here has run it

Auth Audit Skill

Overview

Comprehensive audit of authentication and authorization implementations.

Audit Categories

CategoryChecks
JWTSigning algo, expiration, refresh, storage
SessionsStorage, expiry, regeneration, fixation
OAuth2PKCE, state param, redirect validation
PasswordsHashing algo, strength rules, reset flow
MFAImplementation, backup codes, recovery

Workflow

  1. Detect auth implementation (JWT, sessions, OAuth)
  2. Scan for known anti-patterns
  3. Verify cryptographic choices
  4. Check token/session lifecycle
  5. Audit authorization logic (RBAC, ABAC)

Common Vulnerabilities

  • JWT signed with none algorithm
  • JWT secret too short (< 256 bits)
  • No token expiration or too long
  • Refresh tokens stored in localStorage
  • Session fixation after login
  • Missing CSRF protection
  • OAuth without PKCE for public clients
  • Missing state parameter in OAuth flow

References

What ships with it: 2 files

4.0 KB alongside SKILL.md

references/

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