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.

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)

EPSS: 0.005 (38.8th percentile) — read the EPSS interpretation.

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.

Affected products

Busymac Pal_mcp_server
N/a — versions n/a

Weakness classification (CWE)

References

cve@mitre.org (Exploit, Third Party Advisory, Issue Tracking)
cve@mitre.org (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.