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://secunia.com/advisories/20992/ http://twiki.org/cgi-bin/view/Codev/SecurityAlertSecureFileUploads http://www.vuxml.org/freebsd/a876df84-0fef-11db-ac96-000c6ec775d9.html

The following package is affected: twiki CVE-2006-3336 TWiki 01-Dec-2000 up to 4.0.3 allows remote attackers to bypass the upload filter and execute arbitrary code via filenames with double extensions such as '.php.en', '.php.1', and other allowed extensions that are not .txt. NOTE: this is only a vulnerability when the server allows script execution in the pub directory.