CVE-2025-66401

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/kapilduraphe/mcp-watch/commit/e7da78c5b4b960f8b66c254059ad9ebc544a91a6	Patch
https://github.com/kapilduraphe/mcp-watch/security/advisories/GHSA-27m7-ffhq-jqrm	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:kapilduraphe:mcp_watch:*:*:*:*:*:node.js:*:*

History

18 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) MCP Watch es un escáner de seguridad integral para servidores del Protocolo de Contexto del Modelo (MCP). En 0.1.2 y versiones anteriores, la clase MCPScanner contiene una vulnerabilidad crítica de inyección de comandos en el método cloneRepo. La aplicación pasa el argumento githubUrl proporcionado por el usuario directamente a un shell del sistema a través de execSync sin sanitización. Esto permite a un atacante ejecutar comandos arbitrarios en la máquina anfitriona al añadir metacaracteres de shell a la URL.

Information

Published : 2025-12-01 23:15

Updated : 2026-10-18 18:10

NVD link : CVE-2025-66401

Mitre link : CVE-2025-66401

CVE.ORG link : CVE-2025-66401

JSON object : View

Products Affected

kapilduraphe

mcp_watch

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

{"id": "CVE-2025-66401", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-66401", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2025-12-02T14:14:06.301237Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "kapilduraphe", "product": "mcp-watch", "versions": [{"status": "affected", "version": "<= 0.1.2"}]}]}], "published": "2025-12-01T23:15:53.227", "references": [{"url": "https://github.com/kapilduraphe/mcp-watch/commit/e7da78c5b4b960f8b66c254059ad9ebc544a91a6", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/kapilduraphe/mcp-watch/security/advisories/GHSA-27m7-ffhq-jqrm", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "MCP Watch es un esc\u00e1ner de seguridad integral para servidores del Protocolo de Contexto del Modelo (MCP). En 0.1.2 y versiones anteriores, la clase MCPScanner contiene una vulnerabilidad cr\u00edtica de inyecci\u00f3n de comandos en el m\u00e9todo cloneRepo. La aplicaci\u00f3n pasa el argumento githubUrl proporcionado por el usuario directamente a un shell del sistema a trav\u00e9s de execSync sin sanitizaci\u00f3n. Esto permite a un atacante ejecutar comandos arbitrarios en la m\u00e1quina anfitriona al a\u00f1adir metacaracteres de shell a la URL."}], "lastModified": "2026-10-18T18:10:00.100", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:kapilduraphe:mcp_watch:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "EEA6FBCF-AD89-453B-ACFC-1E09703E03FC", "versionEndIncluding": "0.1.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}