CMS is a content management system. Joomla is used by a lot of orgs both left and right to build web sites. The site hacked is the program’s web site portal. Not a good sign for the most recent build concerning security.
Army,
Depends on the hack. Of course this could be bad for the most recent build *or* an admin got lazy and did not properly secure his site. Could be a poor apache or mysql config. Then again it could be a poorly written stored procedure.
Look at the hack of the ubuntu site recently. They were running on unsupported hardware so they could not patch the kernel *and* they were running clear text ftp. Happens to windows, Linux, Solaris, and pretty much every app out os out there..