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.
CVE-2025-59476
MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EPSS
- 25.9%
- KEV
- Not listed
Published
September 17, 2025
Last Modified
November 4, 2025
References (2)
- jenkinsci-cert@googlegroupshttps://www.jenkins.io/security/advisory/2025-09-17/#SECURITY-3424
- af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/09/17/1
Affected Packages
(1 across 1 ecosystem)
Maven(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| org.jenkins-ci.main:jenkins-core | 2.517 ... 2.527 (11 versions) | 2.528 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2025-59476?
CVE-2025-59476 is a medium vulnerability published on September 17, 2025. 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…
When was CVE-2025-59476 disclosed?
CVE-2025-59476 was first published in the National Vulnerability Database on September 17, 2025, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-59476 actively exploited?
CVE-2025-59476 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-59476?
CVE-2025-59476 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2025-59476?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-59476, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-59476
Is Your Infrastructure Affected by CVE-2025-59476?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.