What is CVE-2023-49656?

CVE-2023-49656 is a critical-severity vulnerability in Jenkins Matlab, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2023-11-29.

How severe is CVE-2023-49656?

Critical severity. CVSS v3 base score is 9.8 out of 10.

XXE in Jenkins Matlab

CVE-2023-49656

Jenkins MATLAB Plugin 2.11.0 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

Vulnerability class: XXE (XML External Entity)

Published 2023-11-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Jenkins Matlab
Jenkins Project Matlab Plugin — versions 0

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

www.jenkins.io/security/advisory/2023-11-29/ (vendor-advisory, Issue Tracking, Vendor Advisory)
www.openwall.com/lists/oss-security/2023/11/29/1 (Mailing List)

Frequently asked questions

What is CVE-2023-49656?: CVE-2023-49656 is a critical-severity vulnerability in Jenkins Matlab, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2023-11-29.
How severe is CVE-2023-49656?: Critical severity. CVSS v3 base score is 9.8 out of 10.