The remote host is missing an update to moin announced via advisory DSA 1791-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201791-1

It was discovered that the AttachFile action in moin, a python clone of WikiWiki, is prone to cross-site scripting attacks when renaming attachements or performing other sub-actions. For the stable distribution (lenny), this problem has been fixed in version 1.7.1-3+lenny2. The oldstable distribution (etch) is not vulnerable. For the testing (squeeze) distribution and the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your moin packages.