What is CVE-2023-40342?

CVE-2023-40342 is a medium-severity vulnerability in Jenkins Flaky Test Handler, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-16.

How severe is CVE-2023-40342?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Jenkins Flaky Test Handler

CVE-2023-40342

Jenkins Flaky Test Handler Plugin 1.2.2 and earlier does not escape JUnit test contents when showing them on the Jenkins UI, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control JUnit report file contents.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Jenkins Flaky Test Handler
Jenkins Project Flaky Test Handler Plugin — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.jenkins.io/security/advisory/2023-08-16/ (vendor-advisory, Vendor Advisory)
www.openwall.com/lists/oss-security/2023/08/16/3 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-40342?: CVE-2023-40342 is a medium-severity vulnerability in Jenkins Flaky Test Handler, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-16.
How severe is CVE-2023-40342?: Medium severity. CVSS v3 base score is 5.4 out of 10.