Jenkins MATLAB Plugin XML External Entity vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2023-49656: 0.84% estimated exploitation activity in the next 30 days; percentile 58.03 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Jenkins MATLAB Plugin determines whether a user-specified directory on the Jenkins controller is the location of a MATLAB installation by parsing an XML file in that directory. MATLAB Plugin 2.11.0 and earlier does not perform permission checks in several HTTP endpoints implementing related form validation. Additionally, these HTTP endpoints do not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability. Additionally, the plugin does not configure its XML parser to prevent XML external entity (XXE) attacks. This allows attackers able to create files on the Jenkins controller file system to have Jenkins parse a crafted XML document that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery. MATLAB Plugin 2.11.1 configures its XML parser to prevent XML external entity (XXE) attacks. Additionally, POST requests and Item/Configure permission are required for the affected HTTP endpoints.

Published by the source

29 Nov 2023, 15:30 UTC

Last modified by the source

5 Dec 2023, 22:53 UTC

Source last checked

26 Oct 2026, 16:20 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-82q9-88m2-4v68

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# Patch Next advisory brief: CVE-2023-49656

Advisory: Jenkins MATLAB Plugin XML External Entity vulnerability
IDs: CVE-2023-49656, GHSA-82q9-88m2-4v68
Record: https://patchnext.com/advisories/cve-2023-49656 (revision 1, source checked 26 Oct 2026, 16:20 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.jenkins-ci.plugins:matlab 2.11.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.jenkins-ci.plugins:matlab: affected < 2.11.1; fixed in 2.11.1

## Suggested inspection (read-only)
- Maven org.jenkins-ci.plugins:matlab: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.jenkins-ci.plugins:matlab.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-82q9-88m2-4v68 (GitHub-reviewed advisory GHSA-82q9-88m2-4v68 lists affected ranges: Maven org.jenkins-ci.plugins:matlab >=0 <2.11.1)

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