KnowledgeTree Document Management (aka KnowledgeTree Open Source) before STABLE 3.3.7 does not require a password for an unregistered user, when the user exists in Active Directory, which allows remote attackers to log onto KTDMS without the intended authorization check.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34463
http://www.vupen.com/english/advisories/2007/1920
http://www.securityfocus.com/bid/24110
http://sourceforge.net/project/shownotes.php?release_id=510338
http://sourceforge.net/forum/forum.php?forum_id=698243