Directory traversal vulnerability in Ragnarok Online Control Panel 4.3.4a, when the Apache HTTP Server is used, allows remote attackers to bypass authentication via directory traversal sequences in a URI that ends with the name of a publicly available page, as demonstrated by a "/...../" sequence and an account_manage.php/login.php final component for reaching the protected account_manage.php page.

functions.php in Ragnarok Online Control Panel (ROCP) 4.3.4a allows remote attackers to bypass authentication by requesting account_manage.php with a trailing "/login.php" PHP_SELF value, which is not properly handled by the CHECK_AUTH function.