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://piwik.org/blog/2011/06/piwik-1-5-security-advisory/ http://www.vuxml.org/freebsd/23c8423e-9bff-11e0-8ea2-0019d18c446a.html
Insight
The following package is affected: piwik