Cross-site scripting (XSS) vulnerability in frontend/x/manpage.html in cPanel 11.18.3 and 11.21.0-BETA allows remote attackers to inject arbitrary web script or HTML via the query string.
https://exchange.xforce.ibmcloud.com/vulnerabilities/41374
http://www.securityfocus.com/archive/1/489963/100/0/threaded