Possible XSS through right_frame parameter in webmail.php
(Text taken from the above URL)
The right_frame parameter in webmail.php was not properly sanitized,
and could allow for an attacker to replace the right frame of a
tricked user with content from another host within the SquirrelMail
interface. Some of the attack vectors are only possible with Internet
This issue also affects RHEL3
Adding to U4 proposed list.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.