Zero-Day Advisory

Fortinet Discovers WordPress Safe SVG Plugin Denial Of Service Bypass Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a Denial Of Service vulnerability in Safe SVG plugin for WordPress.

Safe SVG is the best way to Allow SVG Uploads in WordPress! It gives you the ability to allow SVG uploads whilst making sure that they're sanitized to stop SVG/XML vulnerabilities affecting your site.

A Denial Of Service vulnerability exists in the Safe SVG plugin for WordPress version 1.9.4 and below. Denial of service of user browsing session occurs upon successful exploitation of the vulnerability.

Solutions

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

WordPress.Plugin.SafeSVG.DoS
Released Oct 23, 2019

Users should apply patch provided by SafeSVG

Timeline

Fortinet reported the vulnerability to SafeSVG on 26 September, 2019

SafeSVG confirmed the vulnerability on 10 October, 2019

SafeSVG released patch for the vulnerability on 4 November, 2019.

Acknowledgement

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.