CM E-Mail Blacklist – Simple email filtering for safer registration

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 · 84% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.

Modeled within the band wp.org reports; tightens as we track daily.

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.

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

1. Medium · 4.4 CM E-Mail Blacklist <= 1.6.2 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'black_email' Parameter ↗
   2026-01-16 CVE-2026-0691 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.6.2 Patched in 1.6.3
2. Medium · 6.1 CM E-Mail Blacklist – Simple email filtering for safer registration <= 1.5.5 - Reflected Cross-Site Scripting ↗
   2025-02-03 CVE-2025-24694 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.5.5 Patched in 1.5.6
3. Medium · 6.1 Multiple Plugins <= (Various Versions) - Reflected Cross-Site Scripting via cminds_free_guide Shortcode ↗
   2024-11-25 CVE-2024-11202 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.5.3 Patched in 1.5.4
4. Medium · 4.3 CM Email Registration Blacklist and Whitelist <= 1.4.8 - Cross-Site Request Forgery ↗
   2024-06-22 CVE-2024-5167 Cross-Site Request Forgery (CSRF) Affects <= 1.4.8 Patched in 1.4.9

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

Growth timeline

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

1. 2026-08-23 700+ → 800+ up after 21 days in tier
2. 2026-08-02 800+ → 700+ down after 9 days in tier
3. 2026-07-24 700+ → 800+ up after 1 days in tier
4. 2026-07-23 800+ → 700+ down after 166 days in tier
5. 2026-02-07 900+ → 800+ down after 2 days in tier
6. 2026-02-05 800+ → 900+ up after 6 days in tier
7. 2026-01-30 900+ → 800+ down after 160 days in tier
8. 2025-08-23 1K+ → 900+ down after 12 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).

• Akismet Anti-spam: Spam Protection 5M+ installs · 4.7★ · 2 shared tags A
• Gravity Forms Zero Spam 100K+ installs · 4.2★ · 2 shared tags A
• Maspik – Multi-Layer Spam Protection 30K+ installs · 4.6★ · 2 shared tags A
• Stop Spammers Classic 30K+ installs · 4.4★ · 2 shared tags A
• Gravity Forms Email Blacklist 10K+ installs · 4.1★ · 2 shared tags A
• Spam Destroyer 5K+ installs · 4.5★ · 2 shared tags A

Embed this report card

Drop a live Pulse card for CM E-Mail Blacklist – Simple email filtering for safer registration into a readme, a review or a deck. It updates itself.

CM E-Mail Blacklist – Simple email filtering for safer registration: 800+ active installs, 4.5★ (8 reviews). Plugin Pulse (WP Mayor), as of 2026-08-29. https://plugins.wpmayor.com/plugin/cm-email-blacklist