MCP Watch — Command Injection (CVE-2025-66401)
Date: 2025-12
Affected: kapilduraphe/mcp_watch
Attack vector: command-injection
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2025-66401
CWE: CWE-78
CVSS: 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

MCP Watch is a comprehensive security scanner for Model Context Protocol (MCP) servers. In 0.1.2 and earlier, the MCPScanner class contains a critical Command Injection vulnerability in the cloneRepo method. The application passes the user-supplied githubUrl argument directly to a system shell via execSync without sanitization. This allows an attacker to execute arbitrary commands on the host machine by appending shell metacharacters to the URL.


Mitigations:

Architectural layers (MAESTRO):