What is CVE-2025-67638?

CVE-2025-67638 is a medium-severity vulnerability in Jenkins, classified under Cleartext Storage of Sensitive Information. CVSS score: 4.3/10. Published 2025-12-10.

How severe is CVE-2025-67638?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Jenkins

CVE-2025-67638

Jenkins 2.540 and earlier, LTS 2.528.2 and earlier does not mask build authorization tokens displayed on the job configuration form, increasing the potential for attackers to observe and capture them.

Published 2025-12-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (4.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Jenkins
Jenkins Project — versions 2.541, 2.528.3

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

www.jenkins.io/security/advisory/2025-12-10/ (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-67638?: CVE-2025-67638 is a medium-severity vulnerability in Jenkins, classified under Cleartext Storage of Sensitive Information. CVSS score: 4.3/10. Published 2025-12-10.
How severe is CVE-2025-67638?: Medium severity. CVSS v3 base score is 4.3 out of 10.