If you are running a cPanel Server, your priority administration task should be the security. Some tricks about Server Security can be read on this blog. If you are running a WebHosting business you should provide to your costumers the high security level. A basic security need is to keep cPanel last stable version.
To see if you are running the last cPanel version on you Server or VPS, just login as root and run the next command:
# /usr/local/cpanel/cpanel -V
If you need to update cPanel
or if you want to force it:
# /scripts/upcp --force