Magento User Info Cross Site Scripting

Magento suffers from user information related cross site scripting vulnerabilities. Versions affected include Magento 2.0 prior to 2.0.18, Magento 2.1 prior to 2.1.12, and Magento 2.2 prior to 2.2.3.

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DefenseCode Security Advisory
Magento Multiple Stored Cross-Site Scripting Vulnerabilities

Advisory ID: DC-2018-03-002
Advisory Title: Magento Multiple Stored Cross-Site Scripting Vulnerabilities
Advisory URL:
Software: Magento
Version: Magento 2.0 prior to 2.0.18
Vendor Status: Vendor contacted, vulnerability fixed
Release Date: 06/03/2018

1. General Overview
During the security audit of Magento Open Source 2 multiple medium
risk stored cross-site scripting vulnerabilities were discovered that
could lead to administrator account takeover, putting the website
customers and their payment information at risk.

2. Software Overview
Magento is an ecommerce platform built on open source technology
which provides online merchants with a flexible shopping cart system,
as well as control over the look, content and functionality of their
online store. Magento offers powerful marketing, search engine
optimization, and catalog-management tools. It is a leading
enterprise-class eCommerce platform, empowering over 200,000
online retailers.


3. Vulnerability Description
During the security analysis of Magento Open Source 2 prior to 2.0.18
it was discovered that the application returns unescaped and
unsanitized user/customer controlled input on direct requests to
several application URLs.

User/customer controlled information such as customer first and last
name, street address, city, company, shipping and billing information
are unsanitized and unescaped in an output resulted from a direct
request to the following url:

User/customer first and last name information is unsanitized and
unescaped in an output resulted from a direct request to the
following urls:

The application will return a text/html response with a json-formatted
content. All aforementioned user-controlled input is prone to stored
cross-site scripting.

The prerequisite for this attack is that the Add Secret Key to URLs
option is disabled. Secret keys are an additional anti-CSRF measure in
Magento, with form keys being the primary measure (that can not be
disabled). In a team setting this option is often disabled in order
to be able to to pass admin links to coleagues, tickets, chat, etc.

4. Solution
Vendor fixed the reported security issues and released a new version.
All users are strongly advised to update to the latest available

5. Credits
Discovered by Bosko Stankovic ([email protected]).

6. Disclosure Timeline
19/04/2017 Vendor contacted through Bugcrowd platform
19/04/2017 Vendor responded
28/02/2018 Vulnerability fixed
06/03/2018 Advisory released

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