Vulnerability · Published Dec 1, 2025 · Assigned by GitHub_M
CVE-2025-66401MCP Watch has a Critical Command Injection in cloneRepo allows Remote Code Execution (RCE) via malicious URL
Critical 9.8
In plain English
A critical-severity OS command injection in mcp-watch from kapilduraphe. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 83% of all known vulnerabilities).
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | mcp-watch | no fix listed | GHSA-27m7-ffhq-jqrm |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| kapilduraphe | mcp-watch | <= 0.1.2 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H