Directory traversal vulnerability in index.php in Fantastico, as used with cPanel 11.x, allows remote attackers to read arbitrary files via a .. (dot dot) in the sup3r parameter.
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.