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[FD] Wordpress Truemag Theme - Client Side Cross Site Scripting Web Vulnerability

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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