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Stored Cross-Site Scripting vulnerability in Easy Testimonials WordPress
Plugin
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Bente Schopman, July 2016

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Abstract
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Multiple stored Cross-Site Scripting vulnerabilities were found in the
Easy Testimonials WordPress Plugin. These issues can be exploited by an
authenticated Contributor (or higher). It allows an attacker to perform
a wide variety of actions, such as stealing users' session tokens, or
performing arbitrary actions on their behalf.

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OVE ID
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OVE-20160712-0010

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Tested versions
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These issues were successfully tested on Easy Testimonials WordPress
Plugin version 1.36.1.

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Fix
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This issue is resolved in Easy Testimonials WordPress Plugin version
1.37.

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Details
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https://sumofpwn.nl/advisory/2016/stored_cross_site_scripting_vulnerability_in_easy_testimonials_wordpress_plugin.html

This can be exploited by users with a role lower than the Editor (which has the unfiltered_html privileges) to add scripts and HTML when creating or updating a testimonial. This is possible by the following fields:

- Client Name.
- Position/Web Address/Other.
- Location Reviewed/Product Reviewed/Item Reviewed.

The vulnerability allows an attacker to perform a wide variety of actions, such as stealing users' session tokens, or performing arbitrary actions on their behalf. In order to exploit this issue, the attacker has to lure/force a victim into opening a malicious website.

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Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.