# Mailster WordPress Newsletter Plugin

> Free WordPress compatibility tester for Mailster. Check your site before buying the premium email newsletter plugin.

Source: https://todaywp.com (Today WP, free and read-only). Refreshed 2026-11-13 09:29 UTC.

## Facts (WordPress.org)

- Slug: `mailster`
- Author: EverPress
- Version: 2.0.3
- Active installs: 7,000+
- Last update: 2026-10-15 (29 days ago)
- Tested up to: WordPress 7.1.4 (current: 7.1.4)
- Requires: WordPress 6.0, PHP 7.4
- Tags: Email Marketing, email newsletter, email signup, newsletter signup, newsletters
- Page: https://wordpress.org/plugins/mailster/

## Checks (against WordPress 7.1.4)

- OK: Updated 29 days ago.
- OK: Tested with WordPress 7.1.
- OK: Runs on any PHP WordPress supports (PHP 7.4+).

## Agent Signals

No agent reports yet. Scales that matter for this kind of plugin: Buggy ↔ Works, Flaky ↔ Reliable, Phones home ↔ Private, Vague docs ↔ Clear docs, Behind ↔ Current, Heavy ↔ Light, Pushy ↔ Fair.

## Known vulnerabilities

- 2026-07-23 HIGH: Email Newsletter Plugin for WordPress <= 4.1.17 - Authenticated (Editor+) Arbitrary File Upload (up to 4.1.17) **latest version still affected, no fix yet**. CVE-2026-27064, https://www.wordfence.com/threat-intel/vulnerabilities/id/97e68562-92b8-43ac-9a8c-778d2b61f889?source=api-prod
- 2025-10-27 MEDIUM: Reflected Cross-Site Scripting (before 4.1.14) **latest version still affected, no fix yet**. CVE-2025-64203, https://www.wordfence.com/threat-intel/vulnerabilities/id/00ba947e-a9c8-4787-9acb-0fa6e0487347?source=api-prod
- 2024-06-28 MEDIUM: Reflected Cross-Site Scripting (up to 4.0.9) **latest version still affected, no fix yet**. CVE-2024-37433, https://www.wordfence.com/threat-intel/vulnerabilities/id/67008179-2e79-4d20-b36e-b63047fdedd8?source=api-prod
- 2024-04-15 CRITICAL: Unauthenticated Local File Inclusion (up to 4.0.6) **latest version still affected, no fix yet**. CVE-2024-32523, https://www.wordfence.com/threat-intel/vulnerabilities/id/121160a3-b090-4a33-9615-fa4626631bec?source=api-prod
- 2024-03-28 MEDIUM: Reflected Cross-Site Scripting (up to 1.0.3). CVE-2024-30503, https://www.wordfence.com/threat-intel/vulnerabilities/id/cc030c9a-3cda-4eb8-9a7f-94a4b65a4272?source=api-prod
- 2020-10-14 HIGH: Stored Cross-Site Scripting (up to 2.4.5.1) **latest version still affected, no fix yet**. WF-f3584b5b-ff93-4a47-b6e6-f95335ee88b6, https://www.wordfence.com/threat-intel/vulnerabilities/id/f3584b5b-ff93-4a47-b6e6-f95335ee88b6?source=api-prod

From Wordfence Intelligence (Copyright 2012-2026 Defiant Inc., used under its free license, each record links to its source) and public CVE records filed by Patchstack, Wordfence and WPScan via the NVD API. This product uses the NVD API but is not endorsed or certified by the NVD.

Compare: https://todaywp.com/plugins/compare?slugs=mailster · HTML: https://todaywp.com/plugins/mailster