Product · Strategy11 Team

Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More

1 known vulnerabilities.

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High 7.2

CVE-2026-18331

Formidable Forms <= 6.33.1 - Unauthenticated Stored Cross-Site Scripting via 'frm_user_id' Parameter

The Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'frm_user_id' parameter in all versions up to, and including, 6.33.1 due to insufficient inp…

Strategy11 Team Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More Web / CMS

Aug 26, 2026