Introduction
The OWASP Top 10 is the definitive reference for web application security. It prioritizes the most critical vulnerability categories to guide developers and security teams.
A01 — Broken Access Control
Still ranked #1. Bypassing authorization checks and API endpoints exposed without authorization are the most common issues. Authorization must be enforced server-side on every request.
A02 — Cryptographic Failures
Focuses on the root cause of data exposure: weak or missing cryptography. Sensitive data must be encrypted both in transit (TLS) and at rest.
Conclusion
Security is a process, not a checklist. Embed it into the development lifecycle to catch vulnerabilities early.