Zero-Day Advisory

Fortinet Discovers WordPress Visual Form Builder Plugin CSRF Vulnerability


Fortinet's FortiGuard Labs has discovered a CSRF (Cross-Site Request Forgery) vulnerability in WordPress Visual Form Builder Plugin.

Visual Form Builder is a plugin that allows you to build and manage all kinds of forms for your website in a single place. It has over 50,000+ active installations.

The Visual Form Builder plugin does not enforce nonce checks which could allow attackers to make a logged-in admin or editor delete form entries via a CSRF attack.


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

Released Jun 06, 2022

Upgrade to version 3.0.8 or higher.


Fortinet reported the vulnerability to VFBpro team on Oct 29, 2021

VFBpro Team confirmed the vulnerability on Nov 3, 2021

VFBpro Team patched the vulnerability on April 11, 2022



This vulnerability was discovered by Vishnupriya Ilango 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.