Fortinet Discovers WordPress WPForms Lite Plugin Cross-Site Scripting Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a cross-site scripting (XSS) vulnerability in WordPress WP Forms Lite plugin.

WPForms is a popular WordPress plugin with over 3+ million installations. WPForms allows you to create beautiful contact forms, feedback forms, subscription forms, payment forms, and other types of forms for your site in minutes.

A stored cross-site scripting vulnerability exists in WP Forms plugin (version 1.6.0.1 & below). The vulnerability is caused by improper input sanitization of user input in the choice label parameter inside the form builder that interacts with live preview.

Solutions

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

WordPress.WPFormsLite.FormBuilder.Plugin.XSS
Released May 08, 2020

Upgrade to the latest version - WPForms Lite v1.6.0.2 or above.

Timeline

Fortinet reported the vulnerability to WpForms on May 02, 2020 

WPForms confirmed the vulnerability on May 04, 2020 

WPForms fixed the vulnerability on May 21, 2020 

Acknowledgement

This vulnerability was discovered by Vishnupriya Ilango of Fortinet's FortiGuard Labs.

References

• https://wordpress.org/plugins/wpforms-lite/#developers

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.