Zikula 1.3.5 Build 20 Cross Site Scripting Vulnerability

Product: Zikula Application Framework
Vendor: Zikula Software Foundation
Vulnerable Version(s): 1.3.5 build 20 and probably prior
Tested Version: 1.3.5 build 20
Advisory Publication:  October 16, 2013  [without technical details]
Vendor Notification: October 16, 2013 
Vendor Patch: October 31, 2013 
Public Disclosure: November 13, 2013 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2013-6168
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 vulnerability in Zikula Application Framework, which can be exploited to perform Cross-Site Scripting (XSS) attacks.


1) Cross-Site Scripting (XSS) in Zikula Application Framework: CVE-2013-6168

1.1 The vulnerability exists due to insufficient sanitisation of user-supplied data in "returnpage" HTTP GET parameter passed to "/index.php" script. A remote attacker can trick a logged-in user to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the "alert()" JavaScript function to display "ImmuniWeb" word:

http://[host]/index.php?module=users&type=user&func=login&returnpage=%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E

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Solution:

Update to Zikula 1.3.6 build 19

More Information:
https://github.com/zikula/core/issues/1364
http://community.zikula.org/index.php?module=News&func=display&sid=3132

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References:

[1] High-Tech Bridge Advisory HTB23178 - https://www.htbridge.com/advisory/HTB23178 - Cross-Site Scripting (XSS) in Zikula Application Framework.
[2] Zikula - http://zikula.org - Zikula is an open source MVC web application framework, released under the LGPLv3, that allows you to rapidly build websites for any application.
[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.
[5] ImmuniWeb® - http://www.htbridge.com/immuniweb/ - is High-Tech Bridge's proprietary web application security assessment solution with SaaS delivery model that combines manual and automated vulnerability testing.

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