Jenkins OpenId Connect Authentication Plugin 4.418.vccc7061f5b_6d and earlier does not invalidate the previous session on login. This allows attackers to use social engineering techniques to gain administrator access to Jenkins. OpenId Connect Authentication Plugin 4.421.v5422614eb_e0a_ invalidates the existing session on login.
Jenkins OpenId Connect Authentication Plugin 4.354.v321ce67a_1de8 and earlier does not check the iss (Issuer) claim of an ID Token during its authentication flow, a value that identifies the Originating Party (IdP). This vulnerability may allow attackers to subvert the authentication flow, potentially gaining administrator access to Jenkins. OpenId Connect Authentication Plugin 4.355.v3a_fb_fca_b_96d4 checks the iss (Issuer) claim of an ID Token during its authentication flow when the Issuer is known.
Jenkins OpenId Connect Authentication Plugin 4.354.v321ce67a_1de8 and earlier does not check the aud (Audience) claim of an ID Token during its authentication flow, a value to verify the token is issued for the correct client. This vulnerability may allow attackers to subvert the authentication flow, potentially gaining administrator access to Jenkins. OpenId Connect Authentication Plugin 4.355.v3a_fb_fca_b_96d4 checks the aud (Audience) claim of an ID Token during its authentication flow.
Jenkins OpenId Connect Authentication Plugin stores a password of a local user account used as an anti-lockout feature in a recoverable format, allowing attackers with access to the Jenkins controller file system to recover the plain text password of that account, likely gaining administrator access to Jenkins.
Jenkins OpenId Connect Authentication Plugin 2.6 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins, allowing attackers to perform phishing attacks.
Jenkins OpenId Connect Authentication Plugin 2.4 and earlier does not invalidate the previous session on login.
An exposure of sensitive information vulnerability exists in Jenkins OpenId Connect Authentication Plugin 1.4 and earlier in OicSecurityRealm/config.jelly that allows attackers able to view a Jenkins administrator's web browser output, or control the browser (e.g. malicious extension) to retrieve the configured client secret.