hunt-business-logic

To find business logic vulnerabilities in payment flows, you probe checkout, payment initiation, and callback endpoints for missing server-side validation and weak signature verification. This identifies payment tampering risks where applications trust spoofable client-side controls.

A verification bypass occurs when UI-enforced authorization or verification steps are skipped by calling underlying endpoints directly. It impacts API security by enabling unauthorized access when the server fails to enforce step progression independently.

You test for rate limit bypass by rotating spoofable IP headers and replaying altered stateful request data against target endpoints. This probes trust boundaries to check whether access controls can be circumvented without triggering server-side restrictions.

Yes, this approach works for webhook validation by probing callback endpoints for missing or weak signature verification. It maps attack surfaces within payment provider integrations to ensure reproducible financial impact from spoofed webhook payloads.

You validate authentication bypass findings by mapping attack surfaces on exposed internal endpoints and testing server-side step enforcement directly. This ensures the access control vulnerability has reproducible impact within a short workflow.