What is CVE-2025-27625?

CVE-2025-27625 is a medium-severity vulnerability in Jenkins, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2025-03-05.

How severe is CVE-2025-27625?

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

Open Redirect in Jenkins

CVE-2025-27625

In Jenkins 2.499 and earlier, LTS 2.492.1 and earlier, redirects starting with backslash (`\`) characters are considered safe, allowing attackers to perform phishing attacks by having users go to a Jenkins URL that will forward them to a different site, because browsers interpret these characters as part of scheme-relative redirects.

Vulnerability class: Open Redirect

Published 2025-03-05 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.006 (47.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Jenkins
Jenkins Project — versions 2.492.2, 2.500

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

www.jenkins.io/security/advisory/2025-03-05/ (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-27625?: CVE-2025-27625 is a medium-severity vulnerability in Jenkins, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2025-03-05.
How severe is CVE-2025-27625?: Medium severity. CVSS v3 base score is 4.3 out of 10.