hunt-mfa-bypass

To test for MFA bypass vulnerabilities, systematically analyze the authentication flow's state transitions and validation logic to identify workflow manipulation, rate-limit evasion, or session-state manipulation that allows skipping the multi-factor authentication step.

Common multi-factor authentication bypass vectors include OTP brute-forcing, rate-limit evasion, race conditions, insecure workflow transitions, and session-state manipulation across seven distinct attack patterns targeting the authentication flow validation logic.

Check OTP validation endpoints for brute-force vulnerabilities by testing rate-limit evasion techniques during penetration testing, analyzing if the multi-factor authentication implementation fails to restrict high-speed guessing attempts against the validation logic.

Yes, this MFA bypass methodology works for testing session-state manipulation by analyzing if authentication enforcement via middleware can be bypassed through direct navigation or by manipulating session cookies within the web-based authentication workflow.

The best way to verify if multi-factor authentication is enforced via middleware is to perform validation testing through direct navigation and response tampering, checking if the application's workflow transitions allow skipping the MFA step.

Direct navigation bypasses the multi-factor authentication step when applications rely on insecure workflow transitions instead of server-side validation logic, allowing attackers to skip MFA by manipulating session cookies or state transitions during the authentication flow.