hunt-ato

Validating an ATO chain requires reproducing a complete account takeover on a controlled test account. You must demonstrate taking over test victim account B using attacker account A's session to confirm the exploit chain works end-to-end and qualifies as a critical finding.

Authentication mechanisms vulnerable to account takeover include password reset flows, email change procedures, MFA bypass, session handling, JWT manipulation, and OAuth redirect_uri or callback control. SSO subdomain takeover scenarios also present exploitable paths for unauthorized access.

Validating an account takeover chain requires reproducing a complete account takeover on a controlled test account. You demonstrate accessing test victim account B from attacker account A's session to confirm the exploit chain works end-to-end and qualifies as a critical finding.

Testing OAuth redirect_uri vulnerabilities involves checking callback control configurations for code theft opportunities. You map the OAuth linking and redirect issues as chain primitives, validating whether an attacker can intercept authorization codes to achieve account takeover.

Hunting for MFA bypass chains requires a controlled test environment with at least two accounts. You need attacker account A and victim account B to reproduce the missing step-up authentication or session handling flaws and validate the complete takeover safely.