Jenkins OpenId Connect Authentication Plugin 2.6 and earlier 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.
A cross-site request forgery vulnerability in Jenkins openid Plugin in the OpenIdSsoSecurityRealm.DescriptorImpl#doValidate form validation method allows attackers to initiate a connection to an attacker-specified server.