Jenkins GitHub Plugin 1.37.3 and earlier does not escape the GitHub project URL on the build page when showing changes, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.
Jenkins GitHub Plugin 1.34.4 and earlier uses a non-constant time comparison function when checking whether the provided and computed webhook signatures are equal, allowing attackers to use statistical methods to obtain a valid webhook signature.
A vulnerability exists in the Jenkins GitHub Plugin in GitHubTokenCredentialsCreator.java that allows attackers to capture credentials stored in Jenkins.
A server-side request forgery vulnerability exists in the Jenkins GitHub Plugin in GitHubPluginConfig.java that allows attackers with Overall/Read access to cause Jenkins to send a GET request to a specified URL.
A vulnerability exists in the Jenkins GitHub Plugin in GitHubServerConfig.java that allows attackers with Overall/Read IDs obtained through another method, to capture credentials stored in Jenkins.