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authentication

Authentication security testing - auth bypass, JWT attacks, OAuth flaws, password attacks, 2FA bypass, CAPTCHA bypass, and bot detection evasion.

skills/authentication/SKILL.md

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# Authentication

Test authentication mechanisms including login security, token handling, 2FA, CAPTCHA, and bot detection.

## Techniques

| Type | Key Vectors |
|------|-------------|
| **Auth Bypass** | Default credentials, logic flaws, response manipulation |
| **ADFS/SAML** | Golden SAML, token signing cert theft, assertion manipulation, SAML wrapping |
| **JWT** | Algorithm confusion, key injection, claim tampering, token forging |
| **OAuth** | Redirect manipulation, CSRF, token leakage, scope abuse |
| **Password** | Brute force, credential stuffing, password policy bypass |
| **2FA Bypass** | Response manipulation, direct endpoint access, code reuse, race conditions |