Simple CAPTCHA with Cloudflare Turnstile

Simple CAPTCHA with Cloudflare Turnstile has 2 disclosed vulnerabilities in the WordSec catalog, reported between 2023 and 2026; all 2 are fixed as of September 2026. Their average CVSS score is 5.8, and the most serious one scores 6.4 out of 10.

The most common weakness is Cross-Site Scripting, behind 1 of the records (50%). Other recurring categories include Improper Authorization.

Every one of the 2 issues recorded for Simple CAPTCHA with Cloudflare Turnstile has a vendor fix available, so running the current release closes all known holes.

2 independent researchers contributed these findings, one record each. Simple CAPTCHA with Cloudflare Turnstile is installed on roughly 200,000 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 7.1.

Strategic Overview

Avg CVSSMedium
5.8/ 10
Patch Coverage100%
Open

0

Fixed

2

Get automatic notifications for all Simple CAPTCHA with Cloudflare Turnstile vulnerabilities before they are exploited.

Highest severity on recordCVSS 6.4CVE-2023-5135

Simple Cloudflare Turnstile <= 1.23.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Read the full analysis

Vulnerability Records

2 records
Simple CAPTCHA with Cloudflare Turnstile banner
Latestv1.42.3

Simple CAPTCHA with Cloudflare Turnstile

Elliot Sowersby / RelyWP

Author

Elliot Sowersby / RelyWP

4.7(256)
94/100
Last Updated
2026-09-07 (6d ago)
Active Installs
200,000+
Downloads
2,571,035
Requires WP
4.7+
Requires PHP
0+
Tested up to
WP 7.1
Created
2022-10-15 (4y ago)

Easily add Cloudflare Turnstile to all your WordPress website forms to protect them from spam! A user-friendly, privacy-preserving reCAPTCHA alternative. 100% free! Supported Forms You can currently enable Turnstile on the following forms: WordPress Login Form Registration Form Password Reset Form Comments Form WooCommerce Checkout Pay For Order Account Details Form Login Form Registration Form Password Reset Form Form Plugins WPForms Fluent Forms Contact Form 7 Gravity Forms Formidable Forms Forminator Forms Jetpack Forms Kadence Forms SureForms Other Integrations Elementor Pro Forms Easy Digital Downloads Forms Paid Memberships Pro Forms Mailchimp for WordPress Forms MailPoet Forms BuddyPress Registration Form bbPress Create Topic & Reply Forms MemberPress Forms Ultimate Member Forms WP-Members Forms WP User Frontend Forms WP User Manager Forms wpDiscuz Comments Form CheckoutWC & Flux Checkout Sunshine Photo Cart This plugin is also compatible with WordPress Multisite, and most two-factor authentication (2FA) plugins. Other Features The plugin includes several other features and options: Theme: Select the default theme for Turnstile. Language: Set the default language for Turnstile. Appearance Mode: Choose if Turnstile is always displayed, or only when an interaction is required. Disable Submit Button: Disable the submit button on forms until the Turnstile challenge is completed. Custom Error Message: Set your own custom error message for failed submissions. Whitelist: Prevent Turnstile from showing for logged in users, or certain IP addresses (wildcards are not supported). Resource Hint (Preconnect): Option to enable resource hint preconnect for improved performance. Failsafe Mode: Option to enable failsafe mode. When Cloudflare is down, this mode will either allow submissions, or fallback to reCAPTCHA. Debug Logging: Enable debug logging of Turnstile form submission events to help with troubleshooting. Getting Started It’s super quick and easy to get started with Cloudflare Turnstile! Simply generate a “site key” and “secret key” in your Cloudflare account, and add these in the plugin settings page. Select which forms Turnstile should be added to and click save. Finally, click the “TEST API RESPONSE” button to make sure the Turnstile API response is working OK. A new Cloudflare Turnstile challenge will then be displayed on your selected forms to protect them from spam! For more detailed instructions, please see our setup guide. What is Cloudflare Turnstile? Cloudflare Turnstile delivers frustration-free, CAPTCHA-free web experiences to website visitors. Turnstile is an anti-spam filter that stops abuse and confirms visitors are real without the data privacy concerns or awful UX that CAPTCHA thrusts on users. Learn more here: https://www.cloudflare.com/en-gb/products/turnstile/ Is it free to use? Yes, this plugin is completely free with no paid version, and does not include any additional data tracking. Cloudflare Turnstile is also a completely free service. Plugin Languages Currently available in 14 languages. Thank you to all the contributers! If you would like to help contribute translations, please click here. Other Information For help & suggestions, please create a support topic. Follow the developer @ElliotSowersby on Twitter. View on GitHub Support The Plugin If you would like to support the continued development and support of this plugin, you can make a donation. Trademark Notice Cloudflare, the Cloudflare logo, and Cloudflare Workers are trademarks and/or registered trademarks of Cloudflare, Inc. in the United States and other jurisdictions. This plugin is not affiliated with, endorsed, or sponsored by Cloudflare, Inc.

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