CVE-2026-18100: Roxnor Metform – Contact Form, Survey, Quiz, Conditional Forms, Form Templates & Custom Form Builder For Elementor

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The MetForm – Contact Form, Survey, Quiz, & Custom Form Builder for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mf_form_id' Widget Setting in all versions up to, and including, 4.1.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload bypasses Elementor's save-time wp_kses_post filter because it contains no HTML tags, and MetForm's own str_replace transformation of script tags into JavaScript template literal expressions provides an additional delivery path.

Affected products

• Roxnor Metform – Contact Form, Survey, Quiz, Conditional Forms, Form Templates & Custom Form Builder For Elementor: up to and including 4.1.8

Published 2026-08-25. Last modified 2026-08-26.