OWASP MCP Top 10: Turning the Framework Into a Test Plan
The OWASP MCP Top 10 is useful because it gives teams names for risks that sit between an AI application and the systems the application can actually use. But there’s a trap in treating MCP01 through MCP10 as ten checklist items. A Model Context Protocol deployment is a chain of trust: User → agent → MCP client → MCP server → tool → downstream system → business action. Testing only the server, OAuth configuration, or individual tools can leave important authorization and context failures untouch
🎯 Vulnerability: OAuth 2.0 / JWT Authentication Bypass
💡 Defense Fix: Strictly verify JWT signatures on the backend, enforce state parameter validation, and reject 'alg: none'.