CM E-Mail Blacklist – Simple email filtering for safer registration vulnerabilities
Plugin slug cm-email-blacklist · 4 known vulnerabilities · latest disclosed 2026-01-16 · WordPress.org page
Every listed vulnerability has a fix. Version 1.6.3 or later is not affected by any of them. If your site runs an older version, update it.
0 of 4 rated high or critical (CVSS 7 or more).
Known vulnerabilities in CM E-Mail Blacklist – Simple email filtering for safer registration
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 4.4 | <= 1.6.2 | 1.6.3 | CVE-2026-0691 | 2026-01-16 | Advisory |
| Medium 6.1 | <= 1.5.5 | 1.5.6 | CVE-2025-24694 | 2025-02-03 | Advisory |
| Medium 6.1 | <= 1.5.3 | 1.5.4 | CVE-2024-11202 | 2024-11-25 | Advisory |
| Medium 4.3 | <= 1.4.8 | 1.4.9 | CVE-2024-5167 | 2024-06-22 | Advisory |
Check if a site is affected
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Questions
Is the CM E-Mail Blacklist – Simple email filtering for safer registration plugin safe to use?
All 4 known issues are fixed in current versions (1.6.3 or later). Keeping it updated is what matters.
How do I check which version of CM E-Mail Blacklist – Simple email filtering for safer registration my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.