Jenkins Open Redirect vulnerability

published 2025-03-05 20 mo ago modified 2026-09-08 2 mo ago also BIT-jenkins-2025-27625 , EUVD-2025-6149 , GHSA-8hmv-92wm-39ch

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

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.

Patch / fix

fixed in 3 links 1

maven org.jenkins-ci.main:jenkins-core 2.492.2, 2.500
bitnami jenkins 2.504.1
Jenkins Project Jenkins 2.500

github.com/jenkinsci/jenkins@4a9a3ec commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-27625 updated 2026-10-27 cvss 4.3

jenkins: Open redirect vulnerability

Red Hat OpenShift Developer Tools and Services jenkins
affected: no fix available “Fix deferred”
Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-03-06)

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
OSV	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.jenkins-ci.main:jenkins-core	<2.492.2 >=2.493, <2.500	2.492.2 2.500
bitnami	jenkins	>=2.493.0, <2.504.1	2.504.1

Affected products

Jenkins Project Jenkins

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

Technology feeds

Jenkins rss critical rss

References

github.com /jenkinsci/jenkins/commit/4a9a3ecd08fc00d2f1c1125be789d8be24f02c9e
web
jenkins.io /security/advisory/2025-03-05/#SECURITY-3501
vendor-advisory, web, advisory
nvd.nist.gov /vuln/detail/CVE-2025-27625
advisory, web
github.com /jenkinsci/jenkins
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary