CVE-2007-2720
Group-Office before 2.16-13 does not properly validate user IDs, which allows remote attackers to obtain sensitive information via certain requests for (1) message.php and (2) messages.php in modules/email/. NOTE: some of these details are obtained from third party information.
Date published : 2007-05-16
http://www.securityfocus.com/bid/23925
http://sourceforge.net/project/shownotes.php?release_id=498556&group_id=76359