'[FD] WP Good News Themes - Client Side Cross Site Scripting Web Vulnerability'

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List:       full-disclosure
Subject:    [FD] WP Good News Themes - Client Side Cross Site Scripting Web Vulnerability
From:       Vulnerability Lab <research () vulnerability-lab ! com>
Date:       2016-02-29 13:17:18
Message-ID: 56D444DE.4050903 () vulnerability-lab ! com
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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@Gmail.com) [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)

Disclaimer & Information:
=========================
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consequential loss of business profits or special damages, even if Vulnerability-Lab or its \
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exclusion or limitation of liability for consequential or incidental damages so the foregoing  \
limitation may not apply. We do not approve or encourage anybody to break any licenses, \
policies, deface websites, hack into databases or trade with stolen data.

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