Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

Share of active installs on each version of this plugin. Green is the current release; a big slice on older versions is a user base that has stopped updating.

Refined from the date this plugin crossed into its current band.

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price. A small install base leaves thin data to model from. The recent download trend is too spiky to read.

Recent releases and news for this plugin

1. — Version 5.0 Major anti-spam hardening against protocol-aware bots: every proof-of-work is now bound to a single-use, HMAC-signed token per submission (replay of one solved challenge no longer works), with a per-token and per-IP usag 5.0
2. — Version 4.1.2 CSRF vulnerability fixed 4.1.2
3. — Version 4.1.1 Improved Pattern recognition Solved: Warning for usage of empty keys 4.1.1
4. — Version 4.1 Fail2Ban-Support added Problems with Thrive Comments and json-based submissions fixed 4.1
5. — Version 4.0 The automatic mode has been removed. From now on, all form types require manual configuration of associated patterns and actions to ensure the spam protection functions correctly. During plugin installation, the appropri 4.0
6. — Version 3.8.1 Fixed: Erroneous error handling for file-uploads (i.e. Fancy Product Designer) 3.8.1

4 disclosed vulnerabilities on record for this plugin, all fixed in the current version. Sites on older versions stay exposed until they update.

1. High · 7.2 Invisible Anti-Spam & CAPTCHA <= 5.1 - Unauthenticated Stored Cross-Site Scripting via 'action' Parameter ↗
   2026-08-14 CVE-2026-16145 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 5.1 Patched in 5.1.1
2. Medium · 4.9 Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via Pattern JSON Keys/Values ↗
   2026-08-14 CVE-2026-16146 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Affects <= 5.1 Patched in 5.1.1
3. Medium · 4.9 Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via 'key' Parameter ↗
   2026-08-14 CVE-2026-16094 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Affects <= 5.1 Patched in 5.1.1
4. Medium · 4.3 Anti-spam, Spam protection, ReCaptcha for all forms and GDPR-compliant <= 4.1.1 - Cross-Site Request Forgery ↗
   2025-06-05 CVE-2025-49283 Cross-Site Request Forgery (CSRF) Affects <= 4.1.1 Patched in 4.1.2

Automated install-time checks, tested on PHP 8.1.12 · WP 7.0.1

Translated into 5 languages, 0 at 90% or more

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

1. 2025-11-20 3K+ → 4K+ up after 202 days in tier
2. 2025-05-02 2K+ → 3K+ up after 337 days in tier
3. 2024-05-30 1K+ → 2K+ up after 174 days in tier
4. 2023-12-08 900+ → 1K+ up after 15 days in tier
5. 2023-11-23 800+ → 900+ up after 13 days in tier
6. 2023-11-10 700+ → 800+ up after 13 days in tier
7. 2023-10-28 600+ → 700+ up after 3 days in tier
8. 2023-10-25 700+ → 600+ down after 6 days in tier

Competes with

The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).

• CF7 Apps – Honeypot, Database, Redirection, Webhook, and Addons for Contact Form 7 300K+ installs · 3.8★ · 3 shared tags B
• Gravity Forms Zero Spam 100K+ installs · 4.2★ · 3 shared tags A
• hCaptcha for WP 70K+ installs · 4.5★ · 3 shared tags A
• Stop Spammers Classic 30K+ installs · 4.4★ · 3 shared tags A
• Friendly Captcha for WordPress 10K+ installs · 3.9★ · 3 shared tags B
• Dam Spam 2K+ installs · 4.0★ · 3 shared tags B

Embed this report card

Drop a live Pulse card for Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms into a readme, a review or a deck. It updates itself.

Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms: 4K+ active installs, 4.8★ (50 reviews). Plugin Pulse (WP Mayor), as of 2026-08-29. https://plugins.wpmayor.com/plugin/gdpr-compliant-recaptcha-for-all-forms