The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://developer.joomla.org/security.html http://secunia.com/advisories/36097/ http://www.vuxml.org/freebsd/739b94a4-838b-11de-938e-003048590f9e.html

The following package is affected: joomla15