Multi Outlets POS 3.1 - 'id' SQL Injection

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# Exploit Title: Point of Sales - Multi Outlets POS v3.1 Script - SQL Injection
# Google Dork: N/A
# Date: 08.02.2017
# Vendor Homepage: http://prosoft-apps.com/
# Software Buy: https://codecanyon.net/item/point-of-sales-multi-outlets-pos/17674742
# Demo: http://pos.prosoft-apps.com/pos/
# Version: N/A
# Tested on: Win7 x64, Kali Linux x64
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# Exploit Author: Ihsan Sencan
# Author Web: http://ihsan.net
# Author Mail : ihsan[@]ihsan[.]net
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# SQL Injection/Exploit :
# http://localhost/[PATH]/view_invoice?id=[SQL]
# Etc...
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