exploiting-idor-vulnerabilities

To test for IDOR vulnerabilities, you replay authenticated requests across multiple user sessions to compare responses and detect missing object-level authorization across CRUD endpoints. This process identifies horizontal and vertical access control failures by manipulating object identifiers like numeric IDs or UUIDs.

Cross-session comparison for access control testing involves replaying HTTP requests using two authenticated user sessions to detect horizontal and vertical IDOR. By comparing the responses, you confirm if an application properly enforces object-level authorization between different users.

You can automate IDOR enumeration by integrating Burp Suite, ffuf, and curl with a Python agent to discover predictable ID patterns. This combination maps endpoints and validates write-based IDOR tests across multi-tenant APIs, producing structured reports for remediation.

To validate write-based IDOR on PUT and DELETE endpoints, you replay modification requests across two authenticated sessions to verify if lower-privileged credentials can alter or delete resources. This confirms missing object-level authorization for write operations during authorized penetration tests.

Yes, you need two authenticated user sessions for IDOR testing to perform cross-session comparison. This setup allows you to replay requests from one account against another account's resources to detect horizontal and vertical access control vulnerabilities.

You should test for vertical IDOR during a penetration test when evaluating multi-tenant API reviews and elevated endpoints. This involves attempting to access admin resources with lower-privileged credentials to confirm object-level authorization failures across different user roles.