Path Traversal in Busymac Pal Mcp Server
CVE-2025-66689
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
Weakness classification (CWE)
References
- github.com/BeehiveInnovations/zen-mcp-server/issues/293 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/Team-Off-course/MCP-Server-Vuln-Analysis/blob/main/CVE-2025-66689.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-66689?
- CVE-2025-66689 is a medium-severity vulnerability in Busymac Pal Mcp Server, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-01-12.
- How severe is CVE-2025-66689?
- Medium severity. CVSS v3 base score is 6.5 out of 10.