OWASP Top 10 2025 — What Changed and Why It Matters

The OWASP Top 10 is the gold standard for web application security risk classification. The 2025 edition introduces critical changes that every security professional, developer, and organization must understand. This guide breaks down every category, explains what changed, and provides actionable mapping for your security assessments.

What is the OWASP Top 10?

The Open Worldwide Application Security Project (OWASP) Top 10 is a regularly updated report that outlines the most critical security concerns for web applications. It serves as a foundational awareness document and is widely adopted by organizations worldwide as a baseline for application security testing.

Key Changes in 2025

• A01: Broken Access Control — remains #1, now with expanded IDOR coverage
• A02: Security Misconfiguration — moved up, includes cloud misconfigs
• A03: Supply Chain Failures — NEW category, reflecting real-world attacks
• A04: Cryptographic Failures — renamed for clarity (was 'Sensitive Data Exposure')
• A05: Injection — now includes XSS, SQL injection, and command injection
• A06: Vulnerable and Outdated Components — expanded with SBOM requirements
• A07: Authentication Failures — includes session management issues
• A08: Software and Data Integrity Failures — CI/CD pipeline risks
• A09: Security Logging and Monitoring Failures — detection gaps
• A10: Server-Side Request Forgery (SSRF) — elevated based on incident data

How to Map Your Testing

Every vulnerability you identify during a penetration test or DAST scan should be mapped to the corresponding OWASP 2025 category. This provides standardized communication with development teams and makes your reports immediately actionable.

// Example OWASP mapping in a vulnerability report
{
  "vulnerability": "IDOR on Account Listing",
  "severity": "High",
  "owasp_2025": "A01:2025 Broken Access Control",
  "endpoint": "/bank/showAccount?listAccounts=800001",
  "evidence": "Modified accountId parameter to access other users' data",
  "remediation": "Implement server-side authorization checks per request"
}

Why This Matters for Your Career

Understanding the OWASP Top 10 is non-negotiable for anyone working in application security. Recruiters and hiring managers use it as a baseline competency check. Whether you're conducting DAST assessments, writing pentest reports, or reviewing code — this framework shapes how the industry communicates about vulnerabilities.