WordPress plugin
Mailster WordPress Newsletter Plugin security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 6 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical1
- High2
- Medium3
- Low0
All Mailster WordPress Newsletter Plugin vulnerabilities
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Mailster WordPress Newsletter Plugin: common questions
Does Mailster WordPress Newsletter Plugin have known vulnerabilities?
Yes. VulnCrest Radar lists 6 known vulnerabilities in Mailster WordPress Newsletter Plugin: 1 critical, 2 high, 3 medium. None are known to affect version null.
How do I check which version of Mailster WordPress Newsletter Plugin I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Mailster WordPress Newsletter Plugin vulnerability?
CVE-2026-27064, published Jul 22, 2026: Mailster - Email Newsletter Plugin for WordPress <= 4.1.17 - Authenticated (Editor+) Arbitrary File Upload. Severity: High (CVSS 7.2).
Is any Mailster WordPress Newsletter Plugin vulnerability listed in CISA KEV?
No. None of the known Mailster WordPress Newsletter Plugin vulnerabilities is currently listed in the CISA KEV catalog.