The remote host is missing an update to analog announced via advisory DSA 125-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20125-1

Yuji Takahashi discovered a bug in analog which allows a cross-site scripting type attack. It is easy for an attacker to insert arbitrary strings into any web server logfile. If these strings are then analysed by analog, they can appear in the report. By this means an attacker can introduce arbitrary Javascript code, for example, into an analog report produced by someone else and read by a third person. Analog already attempted to encode unsafe characters to avoid this type of attack, but the conversion was incomplete. This problem has been fixed in the upstream version 5.22 of analog. Unfortunately patching the old version of analog in the stable distribution of Debian instead is a very large job that defeats us. We recommend that you upgrade your analog package immediately.