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WordPress Scoreme Theme Cross Site Scripting

WordPress Scoreme Theme Cross Site Scripting
Posted Apr 1, 2016
Authored by ICG SEC | Site vulnerability-lab.com

WordPress Scoreme theme suffers from a cross site scripting vulnerability.

tags | exploit, xss
MD5 | eff38df974d8042545b58664d8f7a152

WordPress Scoreme Theme Cross Site Scripting

Change Mirror Download

Document Title:
===============
Wordpress Scoreme Theme - Client Side Cross Site Scripting Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1808


Release Date:
=============
2016-04-01


Vulnerability Laboratory ID (VL-ID):
====================================
1808


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


Product & Service Introduction:
===============================
ScoreMe is a dynamic and flexible WordPress theme. The layout of the
this WordPress theme is clean and minimal like modern creative themes.
The theme is a magazine style for those who want to make a website about
preview, reviews and news. ScoreMe has rating system for that.

(Copy of the Homepage:
http://www.wordpressfolio.com/blogmagazine-themes/scoreme-magazine-wordpress-theme-with-ratings/
)


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a cross
site scripting vulnerabilities in the Wordpress Scoreme Theme.


Vulnerability Disclosure Timeline:
==================================
2016-04-01: Public Disclosure (Vulnerability Laboratory)


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


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

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


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


Technical Details & Description:
================================
A cross site scripting web vulnerability has been discovered in the
official Wordpress Scoreme Theme web-application.
The vulnerability allows remote attackers to inject malicious script
codes on the client-side of the affected web-application.

The vulnerability is located in the `s` value of the `index.php` file.
Remote attackers are able to inject own malicious script
codes to the client-side of the affected web-application. The request
method to inject is GET and the attack vector is client-side.

The security risk of the client-side web vulnerability is estimated as
medium with a cvss (common vulnerability scoring system) count of 3.0.
Exploitation of the non-persistent cross site scripting vulnerability
requires low 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 or connected module context.

Request Method(s):
[+] GET

Vulnerable File(s):
[+] index.php

Vulnerable Parameter(s):
[+] s


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by remote attackers without a low
privileged or restricted user account and with low user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.

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

PoC: Exploitation
http://localhost:8080/wordpress/?s="/><script>alert(/XSS By 0x3a/);</script>


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse and encode of the
vulnerable `s` value in the index.php GET method request.
Disallow usage of special chars and filter to prevent client-side script
code injection attacks against the web-application module.


Security Risk:
==============
The security risk of the application-side cross site scripting web
vulnerabilities in the wordpress plugin are estimated as medium. (CVSS 3.0)


Credits & Authors:
==================
Iran Cyber Security Group - 0x3a (ICG SEC) [Iran-Cyber.Net]
[http://www.vulnerability-lab.com/show.php?user=Iran%20Cyber%20Security]
Special Tnx 2 : MOHAMAD_NOFOZI , root3r , Sir.H4m1d , 0day , pi.hack ,
s4jj4d , whitewolf , jok3r , MoHaMaD-BlAcK , l3gi0n, mr.turk , 0xdevil ,
king_k4li



Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without
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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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