Debian DSA-199-1 Critical: mhonarc Cross Site Script Threat

Steven Christey discovered a cross site scripting vulnerability in
mhonarc, a mail to HTML converter. Carefully crafted message headerscan introduce cross site scripting when mhonarc is configured to
display all headers lines on the web. However, it is often useful to
restrict the displayed header lines to To, From and Subject, in which
case the vulnerability cannot be exploited.

This problem has been fixed in version 2.5.2-1.2 for the current
stable distribution (woody), in version 2.4.4-1.2 for the old stable
distribution (potato) and in version 2.5.13-1 for the unstable
distribution (sid).

We recommend that you upgrade your mhonarc package.

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resource...