MCP Watch has a Critical Command Injection in cloneRepo allows Remote Code Execution (RCE) via malicious URL

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-66401
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-01 23:15:53 UTC
Updated2026-10-18 18:10:00 UTC
DescriptionMCP 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.022270000 probability, percentile 0.824410000 (date 2026-10-18)

Problem Types: CWE-78 | CWE-78 CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Kapilduraphe Mcp Watch All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kapilduraphe Mcp-watch affected <= 0.1.2 Not specified

References

ReferenceSourceLinkTags
github.com/kapilduraphe/mcp-watch/commit/e7da78c5b4b960f8b66c254059ad9eb... [email protected] github.com Patch
github.com/kapilduraphe/mcp-watch/security/advisories/GHSA-27m7-ffhq-jqrm [email protected] github.com Exploit, Vendor Advisory
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