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.
http://www.freelists.org/post/dokuwiki/Hotfix-Release-20110525a-Rincewind http://www.vuxml.org/freebsd/0b535cd0-9b90-11e0-800a-00215c6a37bb.html
Insight
The following package is affected: dokuwiki