WP Good News Themes - Client Side Cross Site Scripting Web Vulnerability

[Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>]

Document Title:
===============
WP Good News Themes - Client Side Cross Site Scripting Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1771


Release Date:
=============
2016-02-29


Vulnerability Laboratory ID (VL-ID):
====================================
1771


Common Vulnerability Scoring System:
====================================
3


Product & Service Introduction:
===============================
http://www.momizat.net/
http://themeforest.net/item/goodnews-responsive-wordpress-newsmagazine/1150692


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a client-side 
cross site scripting web vulnerability in the official Wordpress Good News 
Themes.


Vulnerability Disclosure Timeline:
==================================
2016-02-29: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Momizat Inc
Product: Good News - Themes (Web-Application) 2016 Q1


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


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


Technical Details & Description:
================================
Multiple client-side web vulnerabilities has been discovered  in the official 
Wordpress Good News Themes wordpress web-application.
The client-side validation issue allows remote attacker to inject client-side 
script codes to compromise browser to application requests.

The vulnerability is located in the `s` value of the `Good News themes` module. 
Remote attackers are able to inject client-side script code 
to the vulnerable index GET method request. The `s` value is wrong encoded and 
not filtered by the regular validation. The attack vector of 
the issue is client-side and the request method to execute is GET.

The security risk of the client-side vulnerabilities is estimated as medium 
with a cvss (common vulnerability scoring system) count of 3.0. 
Exploitation of the security vulnerability requires no privileged 
web-application user account and low user interaction. 
Successful exploitation of the vulnerabilities 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 Module(s):
                                [+] EGood News - Themes

Vulnerable Parameter(s):
                                [+] s


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


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


PoC: Exploitation
http://goodnews.localhost:8080/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/fa/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/filmes/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/blog/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/?s=";><script>alert(document.cookie)</script>
http://goodnews.localhost:8080/?s=?s=";><script>alert(document.cookie)</script>


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse and encode of the vulnerable 
`s` value. 
Restrict the input and disallow usage of special chars in the parameter GET 
method request to prevent an execution of client-side script codes.


Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerability in 
the good news themes is estimated as medium. (CVSS 3.0)


Credits & Authors:
==================
Milad Hacking - (milad.hacking.blackhat@xxxxxxxxx) [http://fullsecurity.org]
Thanks: iliya Norton - Milad Hacking - Mohamad Ghasemi- irhblackhat - 
Distr0watch - N3TC4T - Ac!D - Mr.G}{o$t -
S4livan - MRS4JJ4D - SeCrEt_HaCkEr , Nazila Blackhat , Bl4ck_MohajeM, Xodiak , 
Ehsan Ice aka Ehsan Hosseini (EhsanSec.ir)


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