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Simple Chatbot Application 1.0 - 'Category' Stored Cross site Scripting

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# Exploit Title: Simple Chatbot Application 1.0 - 'Category' Stored Cross site Scripting
# Date: 16-05-2021
# Exploit Author: Vani K G
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/14788/simple-chatbot-application-using-php-source-code.html
# Version: 1.0
# Tested on: Windows 10/XAMPP

Stored Cross-site scripting(XSS):
Stored XSS, also known as persistent XSS, is the more damaging of the
two. It occurs when a malicious script is injected directly into a
vulnerable web application.

Attack Vector :

This vulnerability can result in the attacker to inject the XSS
payload in the Title field of the page and each time any user will
open the website, the XSS triggers and attacker can able to steal the
cookie according to the crafted payload.

Vulnerable Parameters: Settings System Info field
Payload : <script>alert(1)</script>

Vulnerable URL :

Steps To Reproduce :
1) Go to the admin Dashboard
2) Click on Settings and Select System Info.
3) Put Payload into the System name  input field.
4) Click on Save.
5) XSS payload will be triggered.
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