Multiple PHP remote file inclusion vulnerabilities in W-Agora 4.0 allow remote attackers to execute arbitrary PHP code via a URL in the bn_dir_default parameter to (1) add_user.php, (2) create_forum.php, (3) create_user.php, (4) delete_notes.php, (5) delete_user.php, (6) edit_forum.php, (7) mail_users.php, (8) moderate_notes.php, and (9) reorder_forums.php. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.