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://plone.org/products/plone/security/advisories/cve-2011-0720 http://www.vuxml.org/freebsd/7c492ea2-3566-11e0-8e81-0022190034c0.html

The following packages are affected: plone plone3 CVE-2011-0720 Unspecified vulnerability in Plone 2.5 through 4.0 allows remote attackers to obtain administrative access, read or create arbitrary content, and change the site skin via unknown vectors.