eXtplorer - PHP-based File Manager

Hi I am using Watchful.li to monotor several Joomla 1.5, 2.5 & 3.4 websites.

It has a Malware scan where (described as "detects malware signatures, deep level scan that detects malware signatures in the file system of the website")

After teh Malware scan it returns 2 "Files to check" with the following info

Path: /administrator/components/com_extplorer/index.php
Pattern: header( 'Location: http://'.$_SERVER['HTTP_HOST'])
Reason: Possible PHP injection (redirect)

Path: /administrator/components/com_extplorer/libraries/HTTP/WebDAV/Server/Filesystem.php
Pattern: popen("file -i '$fspath' 2>/dev/null", "r")
Reason: Possible PHP Injection (Unix command)

Can you please let me know if code in these files are secure & the Watchful.li Malware Scan is just being over cautious.

I am using extplorer version 2.1.7

Thank you for taking a look at this!