Jenkins FitNesse Plugin does not correctly escape report contents before showing them on the Jenkins UI, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by users who are able to control the XML input files processed by the plugin.
Jenkins FitNesse Plugin does not configure the XML parser to prevent XML external entity (XXE) attacks. This allows a user able to control the input files for its post-build step to have Jenkins parse a crafted file that uses external entities for extraction of secrets from the Jenkins master, server-side request forgery, or denial-of-service attacks.