Recently i've install Roundcube through One-click deployment for my webmail service, it all works fine till 2 weeks later all my index.php changed to this code
`<?php
/**
- Front to the WordPress application. This file doesn't do anything, but loads
- wp-blog-header.php which does and tells WordPress to load the theme.
*
- @package WordPress
*/
/**
- Tells WordPress to load the WordPress theme and output it.
*
- @var bool
*/
define( 'WP_USE_THEMES', true );
/** Loads the WordPress Environment and Template */
require DIR . '/wp-blog-header.php';`
when it should be the default of Roundcube index.php
check the modification time, the time is similar 
any idea why this is happen ? cause im so confused
