Zero-Day Advisory

Fortinet Discovers WordPress Plugin Meta Slider Denial of Service Vulnerability


Fortinet's FortiGuard Labs has discovered a Denial of Service vulnerability in WordPress plugin Meta Slider.

Meta Slider is the most popular WordPress slider plugin. WordPress is a free and open-source content management system (CMS) which is wildly used to create websites. Creating slideshows with Meta Slider is fast and easy.

A Denial of Service vulnerability exists in Meta Slider because it fails to sanitize user-supplied input. Once the vulnerability is successfully exploited by attacker, the whole WordPress-powered website will not be accessible.


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

Released May 09, 2016

Users should apply the solution provided by Matcha Labs.


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.