Summary
The remote host is missing an update to the system as announced in the referenced advisory.
Solution
Update your system with the appropriate patches or software upgrades.
https://bugzilla.wikimedia.org/show_bug.cgi?id=28534 https://bugzilla.wikimedia.org/show_bug.cgi?id=28639 http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-May/000098.html http://svn.wikimedia.org/svnroot/mediawiki/tags/REL1_16_5/phase3/RELEASE-NOTES http://www.vuxml.org/freebsd/3fadb7c6-7b0a-11e0-89b4-001ec9578670.html
Insight
The following package is affected: mediawiki