WordPress plugin
WP Mailster security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 18 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical1
- High5
- Medium12
- Low0
All WP Mailster vulnerabilities
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WP Mailster: common questions
Does WP Mailster have known vulnerabilities?
Yes. VulnCrest Radar lists 18 known vulnerabilities in WP Mailster: 1 critical, 5 high, 12 medium. None are known to affect version null.
How do I check which version of WP Mailster 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 WP Mailster vulnerability?
CVE-2026-111830, published Oct 20, 2026: WP Mailster <= 1.9.1.0 - Unauthenticated Stored Cross-Site Scripting. Severity: High (CVSS 7.2).
Is any WP Mailster vulnerability listed in CISA KEV?
No. None of the known WP Mailster vulnerabilities is currently listed in the CISA KEV catalog.