It is absolutely the way security issues for packages in universe and multiverse are handled -- best-effort by the community -- and as a community member, I apologise for not having the resources to invest in flashplugin-nonfree for anything save the current development branch.
-- Adobe releases flash-plugin security update 7.0.68 https://launchpad.net/bugs/60256 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs