Authentication Bypass

The login form is just one door, and it is rarely the weakest. This is the full field guide to getting in without the password: SQLi login bypass, response and status tampering, forced browsing, PHP type juggling, password spraying, credential stuffing, MFA/OTP bypass, password-reset poisoning, trusted-header and path-normalisation tricks, OAuth account takeover and JWT bypass — with real payloads (sqlmap, hydra, kerbrute, ffuf, jwt_tool, Burp), detection and fixes.