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://secunia.com/advisories/46461/
http://piwik.org/blog/2011/10/piwik-1-6/
http://www.vuxml.org/freebsd/411ecb79-f9bc-11e0-a7e6-6c626dd55a41.html
Insight
The following package is affected: piwik
