How To Find Broken Access Control Vulnerabilities in the Wild

This blog post explains Broken Access Control (BAC) vulnerabilities — what they are, illustrative examples (e.g., IDOR exposing user data, unauthorized bank transfers), common identifier types (user-chosen IDs, numeric IDs, UUIDs, hashes), and practical techniques for finding BAC bugs such as permissions mapping and the Autorize Burp extension; it is instructional material rather than a report of an active incident.