A cross-site request forgery (CSRF) vulnerability in Jenkins Chef Sinatra Plugin 1.20 and earlier allows attackers to have Jenkins send an HTTP request to an attacker-controlled URL and have it parse an XML response.
A missing permission check in Jenkins Chef Sinatra Plugin 1.20 and earlier allows attackers with Overall/Read permission to have Jenkins send an HTTP request to an attacker-controlled URL and have it parse an XML response.
Jenkins Chef Sinatra Plugin 1.20 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.