CVE-2025-64132: mcp server Auth Bypass — Fix

Description

Jenkins MCP Server Plugin 0.84.v50ca_24ef83f2 and earlier does not perform permission checks in multiple MCP tools, allowing attackers to trigger builds and obtain information about job and cloud configuration they should not be able to access.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
jenkins	mcp_server	< 0.86.v7d3355e6a_a_18

References

Advisories & Patches

https://www.jenkins.io/security/advisory/2025-10-29/#SECURITY-3622

Other References

http://www.openwall.com/lists/oss-security/2025/10/29/2

Frequently Asked Questions

What is CVE-2025-64132? +

Jenkins MCP Server Plugin 0.84.v50ca_24ef83f2 and earlier does not perform permission checks in multiple MCP tools, allowing attackers to trigger builds and obtain information about job and cloud configuration they should not be able to access. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-64132? +

CVE-2025-64132 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-64132? +

CVE-2025-64132 affects products from jenkins, specifically: mcp_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64132? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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