IDOR Vulnerabilities: The Bug That Pays the Most on HackerOne

What is an IDOR?

IDOR occurs when an app exposes internal object references without authorization checks...

Finding IDORs

Change IDs in URLs, request bodies, and headers to access other users' data...

Chaining IDORs

Combine IDOR with other vulnerabilities for higher impact reports...

Secure Implementation

Always perform server-side authorization checks on every sensitive object access...