As far as the security issues go, I can only find these for Cpanel 5
*** {03.08.025} Cross - CPanel CGI multiple vulnerabilities
The CPanel CGI suite version 5 contains two vulnerabilities: remote
command execution via guestbook.cgi and local root privilege elevation
via the oom openwebmail script.
These vulnerabilities are not confirmed.
Source: VulnWatch
http://archives.neohapsis.com/archiv...3-q1/0087.html