ownCloud developer Lukas Reschke has sent an email to the Ubuntu Devel mailing list, requesting that ownCloud (server) is removed from the Ubuntu repositories because the package is old and there are multiple critical security bugs for which no fixes have been backported.
more here.........http://www.webupd8.org/2014/10/owncloud-ubuntu-package-affected-by.html
more here.........http://www.webupd8.org/2014/10/owncloud-ubuntu-package-affected-by.html