Jenkins Mashup Portlets Plugin 1.1.2 and earlier provides the "Generic JS Portlet" feature that lets a user populate a portlet using a custom JavaScript expression, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by authenticated attackers with Overall/Read permission.

Jenkins Mashup Portlets Plugin stored credentials unencrypted on the Jenkins master where they can be viewed by users with access to the master file system.