CVE-2025-24399

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-01-22 · updated 2026-06-17
Weakness: CWE-276

Description

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 Project Jenkins OpenId Connect Authentication Plugin: before 4.438.440.v3f5f201de5dc; from 4.444.vd4c54f157201 before 4.453.v4d7765c854f4 — fixed in 4.438.440.v3f5f201de5dc, 4.453.v4d7765c854f4

How to fix

Upgrade to a fixed version: Jenkins Project Jenkins OpenId Connect Authentication Plugin 4.438.440.v3f5f201de5dc, 4.453.v4d7765c854f4. Check the vendor advisory for mitigations.

References

https://www.jenkins.io/security/advisory/2025-01-22/#SECURITY-3461

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