How severe is CVE-2025-66689?

CVE-2025-66689 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-66689 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66689?

CVE-2025-66689 affects Busymac Pal Mcp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66689?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66689 have an EU (EUVD) identifier?

Yes. CVE-2025-66689 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1917.

When was CVE-2025-66689 published?

CVE-2025-66689 was published on 2026-01-12 and last updated on 2026-06-17.

CVE-2025-66689

CVE-2025-66689 is a medium-severity vulnerability in Busymac Pal Mcp Server with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1917
Weakness: CWE-22
Affected product: Busymac Pal Mcp Server
Published: 2026-01-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-66689?: CVE-2025-66689 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-66689 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66689?: CVE-2025-66689 affects Busymac Pal Mcp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66689?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66689 have an EU (EUVD) identifier?: Yes. CVE-2025-66689 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1917.
When was CVE-2025-66689 published?: CVE-2025-66689 was published on 2026-01-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:busymac:pal_mcp_server:*:*:*:*:*:*:*:*

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