LetterPress – Email Marketing, SMTP, Newsletter & Multi-Brand Subscriber Manager vulnerabilities
Plugin slug letterpress · 3 known vulnerabilities · latest disclosed 2026-10-27 · WordPress.org page
Every listed vulnerability has a fix. Version 2.4.0 or later is not affected by any of them. If your site runs an older version, update it.
0 of 3 rated high or critical (CVSS 7 or more).
Known vulnerabilities in LetterPress – Email Marketing, SMTP, Newsletter & Multi-Brand Subscriber Manager
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 4.4 | <= 2.3.0 | 2.4.0 | CVE-2024-3586 | 2026-10-27 | Advisory |
| Medium 4.3 | < 2.4.0 | 2.4.0 | CVE-2024-3590 | 2024-04-18 | Advisory |
| Medium 4.4 | <= 1.2.2 | 2.4.0 | CVE-2023-27415 | 2023-05-11 | Advisory |
Check if a site is affected
Enter a site address to see which version of LetterPress – Email Marketing, SMTP, Newsletter & Multi-Brand Subscriber Manager and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the LetterPress – Email Marketing, SMTP, Newsletter & Multi-Brand Subscriber Manager plugin safe to use?
All 3 known issues are fixed in current versions (2.4.0 or later). Keeping it updated is what matters.
How do I check which version of LetterPress – Email Marketing, SMTP, Newsletter & Multi-Brand Subscriber Manager 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.