CVE-2025-66689: A path traversal vulnerability exists in Zen MCP Server before 9.8.2 that allows authenticated attackers to re

Q: How do I fix CVE-2025-66689?

pal mcp server: upgrade to 9.8.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-66689 being exploited?

CVE-2025-66689 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-66689 affect?

CVE-2025-66689 affects pal mcp server. Severity is medium (CVSS 6.5). 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

Q: How urgent is CVE-2025-66689?

Priority 40/100. Public exploit reference

This month

MEDIUM 6.5UPGRADE

CVE-2025-66689 is a medium-severity flaw (CVSS 6.5) affecting pal mcp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-22, CWE-552
Published	2026-01-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: busymac

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-12 17:15 UTCPublished CVE record published
2026-06-17 09:57 UTCUpdated Record last modified

busymac pal mcp server UPGRADE

Affected: < 9.8.2

Fixed in: 9.8.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pal-mcp-server || rpm -q pal-mcp-server || pal-mcp-server --version

2. UPGRADE to 9.8.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pal-mcp-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pal-mcp-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-66689?

pal mcp server: upgrade to 9.8.2. Exact commands for each OS are on this page.

Is CVE-2025-66689 being exploited?

CVE-2025-66689 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-66689 affect?

CVE-2025-66689 affects pal mcp server. Severity is medium (CVSS 6.5). 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

How urgent is CVE-2025-66689?

Priority 40/100. Public exploit reference

References

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