File: /var/www/html/wp-content/plugins/wp-mail-bank/lib/callback.php
<?php
/**
* This file is used for handling redirection.
*
* @author Tech Banker
* @package wp-mail-bank/lib
* @version 2.0.0
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
} // Exit if accessed directly
$code = isset( $_REQUEST['code'] ) ? sanitize_text_field( wp_unslash( $_REQUEST['code'] ) ) : ''; // WPCS: CSRF ok, WPCS: input var ok.
$url = admin_url( "admin.php?page=mb_email_configuration&access_token=$code" );
header( "location: $url" );
exit();