The remote host is missing an update to awstats announced via advisory DSA 1679-1.
Morgan Todd discovered a cross-site scripting vulnerability in awstats, a log file analyzer, involving the config request parameter (and possibly others CVE-2008-3714).
For the stable distribution (etch), this problem has been fixed in version 6.5+dfsg-1+etch1.
The unstable (sid) and testing (lenny) distribution will be fixed soon.
We recommend that you upgrade your awstats package.