authz-bypass

Testing for IDOR vulnerabilities involves manipulating URL parameters like invoice= or user= to identify insecure direct object references. By changing values such as order=123 to order=124 while logged in as a regular user, you can detect unauthorized access to other customers' data.

Horizontal authorization bypass occurs when a user accesses another user's data at the same privilege level, while vertical bypass involves performing administrative actions with lower privileges. Both exploit insecure access controls to gain unauthorized data or functionality access.

Yes, header injection exploits special headers like X-Original-URL and X-Forwarded-For to circumvent access controls. These headers can trick applications into routing requests to restricted endpoints by manipulating internal routing logic.

Effective authorization bypass testing requires tools like Burp Suite with the Autorize extension or OWASP ZAP with the Access Control Testing add-on. These tools automate session ID swapping and parameter manipulation to identify access control flaws efficiently.

Authorization bypass testing may miss complex business logic flaws and requires valid session tokens for multiple user roles. It primarily targets parameter manipulation and header injection, potentially overlooking access controls enforced through application logic or API-level constraints.