Directory traversal vulnerability in readmail.cgi for Ipswitch IMail 7.04 and earlier allows remote attackers to access the mailboxes of other users via a .. (dot dot) in the mbx parameter.

Ipswitch IMail 7.04 and earlier stores a user's session ID in a URL, which could allow remote attackers to hijack sessions by obtaining the URL, e.g. via an HTML email that causes the Referrer to be sent to a URL under the attacker's control.