Zero-Day Advisory

Fortinet Discovers Magento Cross-Site Scripting Vulnerability


Fortinet's FortiGuard Labs has discovered a Cross-Site Scripting (XSS) vulnerability in Magento.

Magento is an e-commerce platform written in PHP. It empowers thousands of retailers and brands with the best eCommerce platform and flexible cloud solutions to rapidly innovate and grow.

A XSS vulnerability has been discovered in Magento 2.0 prior to 2.0.18, Magento 2.1 prior to 2.1.12, Magento 2.2 prior to 2.2.3. It is caused by inadequate filtering of multi-byte characters which can lead to Denial-of-Service (DoS) in various components.


FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

Released Sep 28, 2017

FortiWeb can protect this specific vulnerability since the signature package 12.240.

Users should apply the solution provided by Magento.


Fortinet reported the vulnerability to Magento on July 7, 2017.

Magento confirmed the vulnerability on September 27, 2017.

Magento patched the vulnerability on February 27, 2018.


This vulnerability was discovered by Zhouyuan Yang of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.