CVE-2026-18100

MetForm <= 4.1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'mf_form_id' Widget Setting

Published: Aug 25, 2026Updated: Aug 26, 2026 Sources: CVE List NVDCWE-79

6.4MEDIUM

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-79

Affected Products

roxnor

commercialaka roxnor plugin, roxnor elementor addons

MetForm – Contact Form, Survey, Quiz, Conditional Forms, Form Templates & Custom Form Builder for ElementorMixed

Web & CMS Plugins / site-builder

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://plugins.trac.wordpress.org/browser/metform/tags/4.1.4/controls/form-picker-utils.php#L45

plugins.trac.wordpress.org

https://plugins.trac.wordpress.org/browser/metform/tags/4.1.4/utils/util.php#L605

plugins.trac.wordpress.org

https://plugins.trac.wordpress.org/browser/metform/tags/4.1.4/widgets/form.php#L143

plugins.trac.wordpress.org

and 5 more references View all →

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