CVE-2025-24399: Jenkins Openid Connect Authentication

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Jenkins OpenId Connect Authentication Plugin 4.452.v2849b_d3945fa_ and earlier, except 4.438.440.v3f5f201de5dc, treats usernames as case-insensitive, allowing attackers on Jenkins instances configured with a case-sensitive OpenID Connect provider to log in as any user by providing a username that differs only in letter case, potentially gaining administrator access to Jenkins.

Affected products

• Jenkins Openid Connect Authentication: before 4.438.440.v3f5f201de5dc (fixed in 4.438.440.v3f5f201de5dc); from 4.444.vd4c54f157201, before 4.453.v4d7765c854f4 (fixed in 4.453.v4d7765c854f4)

Published 2025-01-22. Last modified 2026-06-17.