Zero-Day Advisory

Fortinet Discovers Matomo Analytics Denial Of Service Vulnerability


Fortinet's FortiGuard Labs has discovered a Denial Of Service Vulnerability in Matomo Web Analytics platform.

Matomo is the leading Free/Libre open analytics platform. Matomo aims to be a Free software alternative to Google Analytics and is already used on more than 1,400,000 websites. Privacy is built-in!

Matomo Web Analytics is susceptible to a Denial Of Service vulnerability. The issue occurs when the server simulates the user input without proper input sanitization which will result in memory exhaustion.


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

Released Nov 22, 2019

Users should apply patch provided by Matomo


Fortinet reported the vulnerability to Matomo on 24 July, 2019

Matomo confirmed the vulnerability on 24 July, 2019

Matomo released patch for the vulnerability on 16 October, 2019.


This vulnerability was discovered by Nguyen Thanh Nguyen 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.