How severe is CVE-2025-59476?

CVE-2025-59476 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-59476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59476?

CVE-2025-59476 primarily affects Jenkins. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-59476?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-59476 have an EU (EUVD) identifier?

Yes. CVE-2025-59476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29721.

When was CVE-2025-59476 published?

CVE-2025-59476 was published on 2025-09-17 and last updated on 2026-06-17.

CVE-2025-59476

CVE-2025-59476 is a medium-severity vulnerability in Jenkins with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-117.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-29721
Weakness: CWE-117
Affected product: Jenkins
Published: 2025-09-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-59476?: CVE-2025-59476 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-59476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59476?: CVE-2025-59476 primarily affects Jenkins. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-59476?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-59476 have an EU (EUVD) identifier?: Yes. CVE-2025-59476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29721.
When was CVE-2025-59476 published?: CVE-2025-59476 was published on 2025-09-17 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*

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CVE-2025-57564 — High (CVSS 8.2): CubeAPM nightly-2025-08-01-1 allow unauthenticated attackers to inject arbitrary log entries into production systems…
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Threat intelligence

Threat-intel indicators referencing this CVE:

220.95.208.142 (ipv4-addr)
46.99.188.194 (ipv4-addr)