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.
References (2)
Core 2
Core References
Exploit, Issue Tracking, Third Party Advisory
https://github.com/BeehiveInnovations/zen-mcp-server/issues/293
Exploit, Third Party Advisory
https://github.com/Team-Off-course/MCP-Server-Vuln-Analysis/blob/main/CVE-2025-66689.md
Scores
CVSS v3
6.5
EPSS
0.0048
EPSS Percentile
37.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-22
CWE-552
Status
published
Products (1)
busymac/pal_mcp_server
< 9.8.2
Published
Jan 12, 2026
Tracked Since
Feb 18, 2026