bugzilla -- cross-site scripting vulnerability

A Bugzilla advisory states:

This advisory covers a single cross-site scripting issue
that has recently been discovered and fixed in the
Bugzilla code: If a malicious user links to a Bugzilla
site using a specially crafted URL, a script in the error
page generated by Bugzilla will display the URL unaltered
in the page, allowing scripts embedded in the URL to
execute.