Vulnerability DatabaseCVE-2025-66689
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CVE-2025-66689
January 12, 2026
A path traversal vulnerability exists in Zen MCP Server before 9.8.2 that allows authenticated attackers to read arbitrary files on the system. The vulnerability is caused by flawed logic in the is_dangerous_path() validation function that uses exact string matching against a blacklist of system directories. Attackers can bypass these restrictions by accessing subdirectories of blacklisted paths.
Affected Packages
https://github.com/BeehiveInnovations/pal-mcp-server.git (GITHUB):
Affected version(s) >=v1.1.0 <v9.8.2
Fix Suggestion:
Update to version v9.8.2
Related Resources (2)
https://github.com/BeehiveInnovations/zen-mcp-server/issues/293
https://github.com/Team-Off-course/MCP-Server-Vuln-Analysis/blob/main/CVE-2025-66689.md
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Files or Directories Accessible to External Parties
CWE-552
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-22
EPSS
Base Score:
0.04