WP Good News Themes - Client Side Cross Site Scripting Web Vulnerability Feb 29 2016 01:17PM
Vulnerability Lab (research vulnerability-lab com)
Document Title:
WP Good News Themes - Client Side Cross Site Scripting Web Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service Introduction:

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:

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

Exploitation Technique:

Severity Level:

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

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 (at) Gmail (dot) com [email concealed]) [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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