CVE-2023-43495

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-20 · updated 2026-06-17
Weakness: CWE-79

Description

Jenkins 2.423 and earlier, LTS 2.414.1 and earlier does not escape the value of the 'caption' constructor parameter of 'ExpandableDetailsNote', resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control this parameter.

Affected products

Jenkins: before 2.414.2; before 2.424 — fixed in 2.414.2, 2.424

How to fix

Upgrade to a fixed version: Jenkins 2.414.2, 2.424. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2023/09/20/5
https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3245
http://www.openwall.com/lists/oss-security/2023/09/20/5
https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3245

Get alerted when CVE-2023-43495 or the next vulnerability affects your stack