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WP Good News Themes Cross Site Scripting

WP Good News Themes Cross Site Scripting
Posted Feb 29, 2016
Authored by Milad Hacking, Vulnerability Laboratory | Site vulnerability-lab.com

WP Good News Themes suffers from a client-side cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 2f6dbc8068ac0fc495a40430881c904a267917e4664027d378ea34d6fa60b893

WP Good News Themes Cross Site Scripting

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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:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied,
including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage,
including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised
of the possibility of such damages. Some states do not allow the 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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