CVE-2025-24399: High severity jenkins openid connect authentication plugin vulnerability
Jenkins OpenId Connect Authentication Plugin 4.452.v2849bd3945fa 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.
Other sources
The Jenkins OpenId Connect Authentication Plugin 4.452.v2849bd3945fa and earlier treats usernames as case-insensitive.
On a Jenkins instance configured with a case-sensitive OpenID Connect provider, this allows attackers to log in as any user by providing a username that differs only in letter case, potentially gaining administrator access to Jenkins.
OpenId Connect Authentication Plugin 4.453.v4d7765c854f4 introduces an advanced configuration option to manage username case sensitivity, with default to case-sensitive.
— GitHub
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-24399?
CVE-2025-24399 is classified as a critical vulnerability.
How do I fix CVE-2025-24399?
To fix CVE-2025-24399, update the Jenkins OpenId Connect Authentication Plugin to version 4.453.v4d7765c854f4 or later.
What is the impact of CVE-2025-24399?
The impact of CVE-2025-24399 allows attackers to log in as any user on Jenkins instances due to case insensitivity of usernames.
Which versions are affected by CVE-2025-24399?
CVE-2025-24399 affects Jenkins OpenId Connect Authentication Plugin versions 4.452.v2849b_d3945fa_ and earlier, except for 4.438.440.v3f5f201de5dc.
What are the prerequisites for CVE-2025-24399 exploit?
The vulnerability CVE-2025-24399 requires Jenkins to be configured with a case-sensitive OpenID Connect provider to be exploited.