Vulnerability · Published Sep 17, 2025 · Assigned by jenkins

CVE-2025-59476

Medium 5.3

In plain English

A medium-severity security flaw in Jenkins from Jenkins Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 67.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	org.jenkins-ci.main:jenkins-core	2.516.3	GHSA-qrh5-jg98-cr48
Maven	org.jenkins-ci.main:jenkins-core	2.528	GHSA-qrh5-jg98-cr48

Affected products (as reported)

Vendor	Product	Versions
Jenkins Project	Jenkins	see references

Weakness: CWE-117 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Jenkins Security Advisory 2025-09-17 vendor-advisory
http://www.openwall.com/lists/oss-security/2025/09/17/1