Wordpress Truemag Theme - Client Side Cross Site Scripting Web Vulnerability

[Vulnerability Lab <research () vulnerability-lab com>]

Document Title:
===============
Wordpress Truemag Theme - Client Side Cross Site Scripting Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1839


Release Date:
=============
2016-04-29


Vulnerability Laboratory ID (VL-ID):
====================================
1839


Common Vulnerability Scoring System:
====================================
3.3


Product & Service Introduction:
===============================
CactusThemes is an experienced and passionate web design team with over 8 years working together designing and 
developing 
themes and plugins. Our goal is to create the best WordPress themes for education, event, news, etc. and meet all your 
needs. 

(Copy of the Homepage: http://www.cactusthemes.com/#themes )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a client-side cross site scripting vulnerability in the 
official Wordpress Truemag Theme.


Vulnerability Disclosure Timeline:
==================================
2016-04-29: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
CactusThemes 
Product: Truemag Theme (Wordpress) - Theme (Web-Application) 2016 Q2


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


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


Technical Details & Description:
================================
A client-side cross site scripting web vulnerability has been discovered in the official Wordpress Truemag Theme 
web-application.
The non-persistent vulnerability allows remote attackers to inject own malicious script code to client-side application 
to browser requests.

The client-side cross site vulnerability is located in the `s` value of the page module GET method request. Remote 
attackers are able to inject 
own malicious script codes to the client-side of the online service web-application to compromise user session 
information or data. The request 
method to execute is GET and the attack vector is non-persistent. 

The security risk of the client-side web vulnerability is estimated as medium with a cvss (common vulnerability scoring 
system) count of 3.3.
Exploitation of the non-persistent web vulnerability requires no privileged web application user account and low user 
interaction (click link). 
Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing, non-persistent 
external redirects, 
non-persistent load of malicious script codes or non-persistent web module context manipulation.

Request Method(s):
                                [+] GET

Vulnerable Service(s):
                                [+] Truemag Theme (Wordpress)

Vulnerable Module(s):
                                [+] /wp-contact/theme/truemag

Vulnerable Parameter(s):
                                [+] s


Proof of Concept (PoC):
=======================
The remote cross site vulnerability can be exploited by remote attackers without privileged web-application user 
account and with low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to 
continue.

Dork(s):
inurl: /wp-contact/theme/truemag

PoC: Payload
"><marquee><font color=black size=15>%20<script>alert(document.cookie)</script></font></marquee>


PoC: Example
http://wp.localhost:8080/?s=[CLIENT SIDE CROSS SITE SCRIPTING VULNERABILITY!]


PoC: Exploitation
http://wp.localhost:8080/?s=";><marquee><font color=black 
size=15>%20<script>alert(document.cookie)</script></font></marquee>


Reference(s):
http://wp.localhost:8080/?s=


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse and encode of the vulnerable `s` value in the webpage GET method 
request.
Encode the parameter and restrict the value input to prevent further script code injection attacks.


Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerability in the vulnerbale `s` value is estimated as 
medium. (CVSS 3.3)


Credits & Authors:
==================
Iran Cyber Security Group - 0x3a (ICG SEC) [Iran-Cyber.Net] 
[http://www.vulnerability-lab.com/show.php?user=Iran%20Cyber%20Security]
Special Thanks: root3r


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=========================
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