The login page in Blackboard Learning and Community Portal System in Academic Suite 6.3.1.424, 6.2.3.23, and other versions before 6 allows remote attackers to bypass authentication and gain privileges as other users via a modified user_id parameter and a "/" in the encoded_pw parameter.
BlackBoard CourseInfo 4.0 does not properly authenticate users, which allows local users to modify CourseInfo database information and gain privileges by directly calling the supporting CGI programs such as user_update_passwd.pl and user_update_admin.pl.