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CVE-2026-89435

Formidable Forms <= 6.35 - Authenticated (Subscriber+) Arbitrary Plugin Installation via 'file_url' Parameter

The Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More plugin for WordPress is vulnerable to Arbitrary Plugin Installation in all versions up to, and including, 6.35 via the 'file_url' parameter parameter. This is due to insufficient URL prefix validation in validate_url_is_in_s3_bucket() and a permission callback that relies solely on a shared token obtainable by any user with the delegable frm_view_forms capability, without checking install_plugins or activate_plugins capabilities. This makes it possible for authenticated attackers, with subscriber-level access and above, to install arbitrary plugins on the server. Exploitation additionally requires that the site is free-only (Formidable Pro is NOT installed).

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Strategy11 Wordpress-extensions
Products
Formidable Forms Formidable Forms
CVE-2026-15990

Formidable Charts <= 2.0.1 - Unauthenticated Arbitrary File Read via 'frm_graph' Parameter

The Formidable Charts plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.0.1 via the 'frm_graph' parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. Successful exploitation requires Formidable Forms Lite, Formidable Forms Pro, and Formidable Charts to be active and requires the wp-content/uploads/frm-charts/ directory to exist, normally after an image-format chart is rendered.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Strategy11 Wordpress
Products
Formidable Forms Wordpress
CVE-2022-45806

WordPress Formidable Forms plugin <= 5.5.4 - Broken Access Control vulnerability

Missing Authorization vulnerability in Strategy11 Form Builder Team Formidable Forms allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Formidable Forms: from n/a through 5.5.4.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms
CVE-2024-23522

WordPress Formidable Forms plugin <= 6.7 - Content Injection vulnerability

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Strategy11 Form Builder Team Formidable Forms allows Code Injection.This issue affects Formidable Forms: from n/a through 6.7.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms
CVE-2024-0660

Formidable Forms <= 6.7.2 - Cross-Site Request Forgery to Stored Cross-Site Scripting

The Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 6.7.2. This is due to missing or incorrect nonce validation on the update_settings function. This makes it possible for unauthenticated attackers to change form settings and add malicious JavaScript via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms
CVE-2024-11188

Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder <= 6.16.1.2 - Reflected Cross-Site Scripting via Custom HTML Form Parameter

The Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder plugin for WordPress is vulnerable to POST-Based Reflected Cross-Site Scripting via the Custom HTML Form parameters in all versions up to, and including, 6.16.1.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Strategy11 Wordpress
Products
Formidable Forms Wordpress
CVE-2017-20194

Formidable Form Builder < 2.05.03 - Unauthenticated Information Disclosure

The Formidable Form Builder plugin for WordPress is vulnerable to Sensitive Data Exposure in versions up to, and including, 2.05.03 via the frm_forms_preview AJAX action. This makes it possible for unauthenticated attackers to export all of the form entries for a given form.

CVSS 3.1 · 5.3 Medium EPSS 1.1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Form Builder Formidable Forms
CVE-2017-20192

Formidable Form Builder < 2.05.03 - Unauthenticated Stored Cross-Site Scripting

The Formidable Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters submitted during form entries like 'after_html' in versions before 2.05.03 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in a victim's browser.

CVSS 3.1 · 8.3 High EPSS 1.1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Form Builder Formidable Forms
CVE-2024-6725

Formidable Forms <= 6.11.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting

The Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘html’ parameter in all versions up to, and including, 6.11.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with form editing permissions and Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms
CVE-2023-1405

Formidable Forms < 6.2 - Unauthenticated PHP Object Injection

The Formidable Forms WordPress plugin before 6.2 unserializes user input, which could allow anonymous users to perform PHP Object Injection when a suitable gadget is present.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms
CVE-2023-2877

Formidable Forms < 6.3.1 - Subscriber+ Remote Code Execution

The Formidable Forms WordPress plugin before 6.3.1 does not adequately authorize the user or validate the plugin URL in its functionality for installing add-ons. This allows a user with a role as low as Subscriber to install and activate arbitrary plugins of arbitrary versions from the WordPress.org plugin repository onto the site, leading to Remote Code Execution.

CVSS 3.1 · 8.8 High EPSS 22.5% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms
CVE-2024-9768

Formidable Forms < 6.14.1 - Admin+ Stored XSS

The Formidable Forms WordPress plugin before 6.14.1 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Strategy11
Products
Formidable Forms