CVE-2025-66689

6.5 mediumEPSS 0.6%

Medium (6.5) in busymac pal mcp server. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWEs: CWE-22, CWE-552
Published: 2026-01-12
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

busymac:pal_mcp_server

References

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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