Vulnerability in Jenkins
CVE-2025-59476
Jenkins 2.527 and earlier, LTS 2.516.2 and earlier does not restrict or transform the characters that can be inserted from user-specified content in log messages, allowing attackers able to control log message contents to insert line break characters, followed by forged log messages that may mislead administrators reviewing log output.
EPSS: 0.003 (26.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Jenkins
- Jenkins Project — versions 2.516.3, 2.528
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jenkinsci-cert@googlegroups.com (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-59476?
- CVE-2025-59476 is a medium-severity vulnerability in Jenkins, classified under Improper Output Neutralization for Logs. CVSS score: 5.3/10. Published 2025-09-17.
- How severe is CVE-2025-59476?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-59476 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.