CVE-2025-66689

State: Published
Severity: 6.5 Medium
Published: Jan 12, 2026
Updated: Jan 12, 2026
Reserved: Dec 8, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-552 Files or Directories Accessible to External Parties

Affected Products

Product	Versions
n/an/a	n/aAffected

References

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