Add nonce in registration form

core/um-register.php

@@ -2,4 +2,24 @@
 
 class UM_Register {
 	
+	function __construct(){
+
+		add_action("um_after_register_fields",  array( $this, 'add_nonce' ) );
+		add_action("um_submit_form_register", array( $this, 'verify_nonce'), 1, 1);
+	}
+
+	public function add_nonce(){
+		wp_nonce_field( 'um_register_form' );
+	}
+
+	public function verify_nonce( $args ){
+		global $ultimatemember;
+
+		if ( ! wp_verify_nonce( $args['_wpnonce'], 'um_register_form' ) || empty( $args['_wpnonce'] ) || ! isset( $args['_wpnonce'] ) ) {
+			wp_die('Invalid Nonce.');
+		}
+
+		return $args;
+	}
+
 }