idor-broken-object-authorization

Test IDOR and broken object-level authorization by replaying requests from one user account with another user's credentials, systematically swapping object identifiers across routes, parameters, request bodies, headers, and cookies to detect authorization enforcement failures.

Horizontal privilege escalation tests accessing resources owned by peers at the same privilege level, while vertical escalation targets resources belonging to higher-privileged users. IDOR testing methodology covers both by varying object identifiers and swapping session contexts across different account roles.

Yes, broken authorization testing includes validating mass assignment vulnerabilities by injecting additional object properties into request bodies, and checks business-logic state machine abuse by manipulating object ownership transitions and referenced-resource authorization states.

IDOR testing applies to GraphQL endpoints and sub-resources by mapping comprehensive object identifier surfaces across path variables, query parameters, JSON bodies, forms, headers, cookies, and real-time channels to uncover referenced-resource authorization gaps.

The best way to perform A-B testing for object ownership validation is establishing a structured methodology where captured requests from UserA are replayed using UserB credentials, applying verb variation across HTTP methods and indirect object reference chain checks to confirm authorization enforcement.

Check for indirect object reference chains by systematically varying object identifiers and reference parameters across all supported locations in API routes, verifying whether the application enforces referenced-resource authorization when sub-resources or nested object references are manipulated.