Wordpress Contentive Theme - Cross Site Web Vulnerability

Document Title:
===============
Wordpress Contentive Theme - Cross Site Web Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2065


Release Date:
=============
2017-05-22


Vulnerability Laboratory ID (VL-ID):
====================================
2065


Common Vulnerability Scoring System:
====================================
4.3


Vulnerability Class:
====================
Cross Site Scripting - Non Persistent


Product & Service Introduction:
===============================
Contentive is a global B2B media and information company, helping professionals and businesses excel in a digital world. We provide an
engaging mix of news, events, intelligence and training, across Digital Marketing, Digital Finance and other Business Media verticals. 

(Copy of the Vendor Homepage: https://www.contentive.com/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a stored cross site scripting vulnerability in the official Contentive Theme for Wordpress.


Vulnerability Disclosure Timeline:
==================================
2015-05-23: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================

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


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


Technical Details & Description:
================================
A stored cross site scripting web vulnerability has been discovered in the official Wordpress Contentive 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 `label` 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 security risk of the cross site web vulnerability is estimated as medium.
Exploitation of the cross site vulnerability requires no privileged web-application user account and low user interaction. 
Successful exploitation results in session hijacking, persistent phishings attacks, persistent external redirect and malware loads or persistent 
manipulation of affected and connected module context.

Request Method(s):
[+] GET

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

Vulnerable Module(s):
[+] Input

Vulnerable Parameter(s):
[+] label


Proof of Concept (PoC):
=======================
The remote cross site vulnerability can be exploited by remote attackers privileged web-application user accounts with low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


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

PoC: Exploitation
http://wp.localhost:8080/?s="'/><svg/onload=alert(/31337/);>


PoC: Vulnerable Source
<form role="search" method="get" id="searchform" action="http://wp.localhost:8080">
    <div>
    <input type="text" value=""'/><svg/onload=alert(123);>" name="s" id="s"/>
    <input type="submit" id="searchsubmit" value=""/>
    </div>
    </form>	


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


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a parse and encode of the vulnerable `label` 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 stored cross site scripting vulnerability in the wordpress theme is estimated as medium.


Credits & Authors:
==================
ZwX - [http://www.vulnerability-lab.com/show.php?user=ZwX]


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