If you build, upload and maintain your own website and are not utilizing our "Managed Sites" feature, you are responsible for keeping your scripts up to date.
Many scripts obtained on the web or in various programs for sending mail, or guestbooks, chat programs, forums etc, all become outdated in time which means someone has found a way to hack into them.
Ignoring this and not keeping things up to date puts your site and our servers in jeopardy. Hacked sites will be removed instantly until resolved, to spare the rest of the server and prevent any further infiltration.
If you need help updating something, please ask.