Problem Statement
In the OWASP Top 10 (2021), which risk jumped to A01 and is now the most common cause of serious web issues?
Explanation
Broken access control is number one because many apps fail to enforce ownership checks and authorization rules consistently.
Typical signs are IDOR or BOLA issues, forced browsing to admin paths, and missing server-side checks. The OWASP Top 10 page highlights why this category moved to A zero one and why it maps to many CWEs across real apps.
Code Solution
SolutionRead Only
GET /api/invoices/12345 // served without verifying the user owns 12345
