What is CVE-2026-42525?

CVE-2026-42525 is a medium-severity vulnerability in Jenkins Azure Ad, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-04-29.

How severe is CVE-2026-42525?

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

Open Redirect in Jenkins Azure Ad

CVE-2026-42525

Jenkins Microsoft Entra ID (previously Azure AD) Plugin 666.v6060de32f87d and earlier does not restrict the redirect URL after login, allowing attackers to perform phishing attacks.

Vulnerability class: Open Redirect

Published 2026-04-29 · 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: 0.003 (23.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.6% 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: 0.003 · change: +0.001

Affected products

Jenkins Azure Ad
Jenkins Project Microsoft Entra Id (Previously Azure Ad) Plugin — versions 0

Weakness classification (CWE)

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

References

www.jenkins.io/security/advisory/2026-04-29/ (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42525?: CVE-2026-42525 is a medium-severity vulnerability in Jenkins Azure Ad, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-04-29.
How severe is CVE-2026-42525?: Medium severity. CVSS v3 base score is 4.3 out of 10.