CVE-2026-18328

Forminator Forms <= 1.57.0 - Unauthenticated DOM-Based Cross-Site Scripting via 'error_description' Parameter

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

7.2HIGH

Description

The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to DOM-Based Reflected Cross-Site Scripting via the 'error_description' parameter in all versions up to, and including, 1.57.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability is only triggerable on pages hosting a Forminator form configured to use the Stripe Checkout Sessions payment API, which became the default in 1.56.0.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

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

wpmudev

commercialaka forminator forms, broken link checker

Forminator Forms – Contact Form, Payment Form & Custom Form BuilderOn-premCMS Plugin

Web & CMS Plugins / wordpress-plugin

Exploitability

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

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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/forminator/tags/1.56.0/assets/js/front/front.stripe.js#L1539

plugins.trac.wordpress.org

https://plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/assets/js/front/front.stripe.js#L196

plugins.trac.wordpress.org

https://plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/assets/js/front/front.stripe.js#L468

plugins.trac.wordpress.org

and 4 more references View all →

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