WP Mailster

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 · 100% run the current release. 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.

1. ★★★★★ cncladmin

   1.7y ago

   I’ve been using this plugin for about 3 years now, and it’s been working a charm. Simple and effective. Then I recently ran into a little problem. The developer responded very quickly, and I was able to resolve the issue right away.

   Read on wp.org ↗
2. ★★★★★ Peter Borcherds

   1.8y ago

   Holger was brilliant in helping me sort an issue with blank emails. He sent me an amended version of the plugin which solved the issue. Great communication and so helpful, even though we use the free version! The plugin is full of features not available in other WordPress mailing list plugins, and the even the free version gives us all the functionality we want. Thank you, Holger!

   Read on wp.org ↗
3. ★★★★★ Eric

   2.3y ago

   I’ve been using Mailster for many years, first in Joomla and now in WordPress. The most important thing for me is that the editors use their regular WordPress login to manage the mailing lists. And it just works.

   Read on wp.org ↗
4. ★★★★★ Michael Finkenberger

   2.4y ago

   I have been using this plugin for a longer period on different sites and I am very happy with its possibilities and its versatility. Recently, I had a problem which was related with the new EU legislation when it comes to using a from address different from the mail list address. Although I am using just the free version (as of today…), I was supported in a superb manner with fast and helpful suggestions. At the end, those suggestions were correct and the problem was solved with some effort provided by the plugin author! I can absolutely recommend this plugin not only or its functionality, but also for the service being provided: you are definitely not alone! Thanks for that and kindest regards! Michael

   Read on wp.org ↗
5. ★★★★★ Herky Fishbine

   2.6y ago

   Does what it says it does. Fast support.

   Read on wp.org ↗
6. ★★★★★ thpho

   2.8y ago

   This plugin is the best alternative one can find when “migrating” from tools like Mailman. Support is provided directly by the dev and excellent. I can clearly recommend this plugin over all the other options out there! Thank You.

   Read on wp.org ↗
7. ★★★★★ nyks-barton

   2.9y ago

   Works fine, easy to use. This topic was modified 2 years, 10 months ago by nyks-barton.

   Read on wp.org ↗
8. ★★★★★ holgerka

   3.5y ago

   We are a small non profit org (choir). After we changed our Webhosting Provider we suddenly faced the issue, that we produce too much emails / hour somtimes: When discussions via email come up within a group of 40 people this sums up fast and the webhosting is somewhat restrictive. We had six distribution lists with forwarding to members individual mail addresses. We looked for a better solution, which allows unlimited mail sending. Now we are using WP Mailster and it does the job as we need it. The option to have both WordPress Users and users created directly in the plugin assigned to groups or mailinglists is great and saves some time. Also self-signup is useful and the added layer of security (e.g. only list members are allowed to send to the list) is an improvement compared to our legacy setup. We are using Amazon Simple Email Service via SMTP to send emails coming from WP Mailster. I had some trial and error to identify the correct SMTP setup, but finally it works. I sent the setup to the author, so it can go to the list of provider settings, which the author published on the plugin website.

   Read on wp.org ↗

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

1. Medium · 6.1 WP Mailster <= 1.8.20.0 - Reflected Cross-Site Scripting ↗
   2025-01-28 CVE-2025-24688 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.8.20.0 Patched in 1.8.21.0
2. Medium · 5.3 WP Mailster <= 1.8.17.0 - Unauthenticated Sensitive Information Exposure ↗
   2025-01-06 CVE-2025-22303 Exposure of Sensitive Information to an Unauthorized Actor Affects <= 1.8.17.0 Patched in 1.8.18.0
3. Medium · 6.1 WP Mailster <= 1.8.17.0 - Reflected Cross-Site Scripting ↗
   2024-12-22 CVE-2025-24598 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.8.17.0 Patched in 1.8.18.0
4. Medium · 4.3 WP Mailster <= 1.8.17.0 - Cross-Site Request Forgery ↗
   2024-12-11 CVE-2024-54355 Cross-Site Request Forgery (CSRF) Affects <= 1.8.17.0 Patched in 1.8.18.0
5. Medium · 5.3 WP Mailster <= 1.8.16.0 - Unauthenticated Sensitive Information Exposure ↗
   2024-12-07 CVE-2025-24567 Exposure of Sensitive Information to an Unauthorized Actor Affects <= 1.8.16.0 Patched in 1.8.17.0
6. Medium · 6.4 WP Mailster <= 1.8.17.0 - Authenticated (Contributor+) Stored Cross-Site Scripting ↗
   2024-12-02 CVE-2024-11782 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.8.17.0 Patched in 1.8.18.0
7. High · 7.5 WP Mailster <= 1.8.16.0 - Missing Authorization ↗
   2024-12-02 CVE-2024-53805 Missing Authorization Affects <= 1.8.16.0 Patched in 1.8.17.0
8. Medium · 6.5 WP Mailster <= 1.8.16.0 - Missing Authorization ↗
   2024-12-02 CVE-2024-53803 Missing Authorization Affects <= 1.8.16.0 Patched in 1.8.17.0
9. High · 8.8 WP Mailster <= 1.8.16.0 - Authenticated (Contributor+) SQL Injection via orderby ↗
   2024-12-02 CVE-2024-53807 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Affects <= 1.8.16.0 Patched in 1.8.17.0
10. Medium · 5.3 WP Mailster <= 1.8.16.0 - Unauthenticated Information Exposure ↗
    2024-12-02 CVE-2024-53804 Exposure of Sensitive Information to an Unauthorized Actor Affects <= 1.8.16.0 Patched in 1.8.17.0
11. Medium · 6.1 WP Mailster <= 1.8.15.0 - Reflected Cross-Site Scripting ↗
    2024-11-23 CVE-2025-24559 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.8.15.0 Patched in 1.8.16.0
12. Medium · 6.4 WP Mailster <= 1.8.16.0 - Authenticated (Contributor+) Stored Cross-Site Scripting ↗
    2024-11-23 CVE-2024-53737 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.8.16.0 Patched in 1.8.17.0
13. Medium · 6.1 WP Mailster < 1.5.5 - Cross-Site Scripting ↗
    2017-12-05 CVE-2017-17451 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects < 1.5.5 Patched in 1.5.5

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

Translated into 6 languages, 4 at 90% or more

Growth timeline

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

1. 2026-05-01 400+ → 300+ down after 1 days in tier
2. 2026-04-30 300+ → 400+ up after 5 days in tier
3. 2026-04-25 400+ → 300+ down after 3 days in tier
4. 2026-04-22 300+ → 400+ up after 1 days in tier
5. 2026-04-21 400+ → 300+ down after 2 days in tier
6. 2026-04-19 300+ → 400+ up after 1 days in tier
7. 2026-04-18 400+ → 300+ down after 1 days in tier
8. 2026-04-17 300+ → 400+ up after 8 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).

• Mailing Group Listserv 100+ installs · 4.0★ · 2 shared tags C
• Participants Database 7K+ installs · 4.9★ · 1 shared tag A
• Newsletters 2K+ installs · 4.6★ · 1 shared tag A
• Email Marketing Plugin – WP Email Capture 1K+ installs · 4.2★ · 1 shared tag B
• Benchmark Email Lite 1K+ installs · 3.9★ · 1 shared tag B
• Contact Form 7 GetResponse Extension 1K+ installs · 4.0★ · 1 shared tag B

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WP Mailster: 300+ active installs, 4.9★ (32 reviews). Plugin Pulse (WP Mayor), as of 2026-08-30. https://plugins.wpmayor.com/plugin/wp-mailster