Jenkins global-build-stats Plugin 1.5 and earlier does not escape multiple fields in the chart configuration on the 'Global Build Stats' page, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Overall/Administer permission.
Some URLs provided by Jenkins global-build-stats plugin returned a JSON response that contained request parameters. These responses had the Content Type: text/html, so could have been interpreted as HTML by clients, resulting in a potential reflected cross-site scripting vulnerability. Additionally, some URLs provided by global-build-stats plugin that modify data did not require POST requests to be sent, resulting in a potential cross-site request forgery vulnerability.