MetForm – Contact Form, Survey, Quiz, Conditional Forms, Form Templates & Custom Form Builder for Elementor <= 4.3.0 - Unauthenticated HTML Injection via Form Submission Notification Emails

ID

WPSEC-2026-0014

Plugin

MetForm – Contact Form, Survey, Quiz, Conditional Forms, Form Templates & Custom Form Builder for Elementor (metform)

Affected

all versions before 4.3.1

Remediation

Update to 4.3.1 or later.

CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness

CWE-80

Usage

Plugin High · Affected versions Medium among sites WPSec scans, 2026-10-22

Attack surface

MetForm – Contact Form, Survey, Quiz, Conditional Forms, Form Templates & Custom Form Builder for Elementor on WPSec AttackSurface

Fix released

2026-09-30

Published

2026-10-01

Description

The MetForm plugin for WordPress is vulnerable to HTML Injection via submitted form values in all versions up to, and including, 4.3.0 due to submitted values being inserted into the HTML body of notification emails without escaping. This makes it possible for unauthenticated attackers to inject arbitrary HTML into the notification emails sent to site administrators and form submitters, which could be used for phishing or content spoofing.

References

• https://wpsec.com/vuln/WPSEC-2026-0014/
• https://plugins.svn.wordpress.org/metform/tags/4.3.1/
• https://wordpress.org/plugins/metform/

Published by WPSec. Provided as is, without warranty. Corrections: contact us.

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