The remote host is missing an update to fckeditor announced via advisory DSA 1836-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201836-1

Vinny Guido discovered that multiple input sanitising vulnerabilities in Fckeditor, a rich text web editor component, may lead to the execution of arbitrary code. The old stable distribution (etch) doesn't contain fckeditor. For the stable distribution (lenny), this problem has been fixed in version 1:2.6.2-1lenny1. For the unstable distribution (sid), this problem has been fixed in version 1:2.6.4.1-1. We recommend that you upgrade your fckeditor package.