Multiple cross-site scripting (XSS) vulnerabilities in Blackboard Learning System 6, Blackboard Learning and Community Portal Suite 6.2.3.23, and Blackboard Vista 4 allow remote attackers to inject arbitrary Javascript, VBScript, or HTML via (1) data, (2) vbscript, and (3) malformed javascript URIs in various HTML tags when posting to the Discussion Board.

Blackboard Academic Suite 6.0 and earlier does not properly clear session information when de-authenticating a user who is idle, which allows subsequent users to log in as the previous user and gain privileges. NOTE: the vendor has disputed this issue, saying that "This is a customer specific issue related to their Kerberos authentication single sign-on application and not a vulnerability in the Blackboard product.