Apply a simple mathematical captcha to specific buttons by providing their CSS class or ID to prevent spamming.
As of April 2026, Mathematical Captcha Applier is a WordPress captcha plugin with 0 active installations and a 0/5 rating0. It has been downloaded 250 times in total. Requires WordPress 5.6+ and PHP 7.2+. Available on WordPress.org since 2025. Top alternative: SiteGuard WP Plugin.
Mathematical Captcha Applier is a lightweight WordPress plugin that lets you easily apply a simple math-based captcha to form submit buttons on your website by specifying their CSS selector. Just provide a specific button’s CSS selector, and the plugin will display a captcha prompt before the action is completed. This could help to prevent spam and unwanted bot activity.
Features:
– Add a mathematical captcha to form submit buttons (<input type="submit"> or <button type="submit">) by specifying their CSS selector (ID or class).
– Attempts to protect forms from automated submissions.
– No external dependencies — lightweight and fast.
– Simple configuration via the WordPress dashboard.
– If JavaScript is disabled, this plugin will hide the sel…
| WordPress | 5.6+ requiredTested up to 6.9.4 |
| PHP | 7.2+ required |
Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.