Cross-site scripting (XSS) vulnerability in forum.php in Jamroom before 4.1.9 allows remote attackers to inject arbitrary web script or HTML via the post_id parameter in a modify action.
Directory traversal vulnerability in index.php in Jamroom 3.1.2, 3.2.3 through 3.2.6, 4.0.2, and possibly other versions before 3.4.0 allows remote attackers to include arbitrary files via directory traversal sequences in the t parameter.
The jrCookie function in includes/jamroom-misc.inc.php in JamRoom before 3.4.0 allows remote attackers to bypass authentication and gain administrative access via a boolean value within serialized data in a JMU_Cookie cookie.