dynaliens 2.0 and 2.1 allows remote attackers to bypass authentication and perform certain privileged actions via a direct request for (1) validlien.php3 (2) supprlien.php3 (3) supprub.php3 (4) validlien.php3 (5) confsuppr.php3 (6) modiflien.php3, or (7) confmodif.php3 in admin/.