Kit (formerly ConvertKit) – Email Subscribers, Email Newsletter, Email Marketing, Landing Pages and Membership vulnerabilities
Plugin slug convertkit · 8 known vulnerabilities · latest disclosed 2026-11-11 · WordPress.org page
Every listed vulnerability has a fix. Version 3.5.1 or later is not affected by any of them. If your site runs an older version, update it.
0 of 8 rated high or critical (CVSS 7 or more).
Known vulnerabilities in Kit (formerly ConvertKit) – Email Subscribers, Email Newsletter, Email Marketing, Landing Pages and Membership
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 5.3 | <= 3.5.0 | 3.5.1 | CVE-2026-125439 | 2026-11-11 | Advisory |
| Medium 5.3 | <= 3.4.7 | 3.4.8 | CVE-2026-27063 | 2026-10-29 | Advisory |
| Medium 5.3 | <= 3.4.6 | 3.4.7 | CVE-2026-110880 | 2026-10-16 | Advisory |
| Medium 5.3 | <= 3.3.5 | 3.3.6 | CVE-2026-65472 | 2026-07-22 | Advisory |
| Medium 5.3 | <= 2.4.9 | 2.4.9.1 | CVE-2024-3961 | 2024-06-20 | Advisory |
| Medium 5.3 | <= 2.4.5 | 2.4.6 | CVE-2024-31245 | 2024-04-05 | Advisory |
| Medium 6.1 | <= 2.2.0 | 2.2.1 | CVE-2023-2337 | 2023-05-15 | Advisory |
| Medium 6.4 | <= 2.0.4 | 2.0.5 | CVE-2022-4508 | 2022-12-23 | Advisory |
Check if a site is affected
Enter a site address to see which version of Kit (formerly ConvertKit) – Email Subscribers, Email Newsletter, Email Marketing, Landing Pages and Membership and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the Kit (formerly ConvertKit) – Email Subscribers, Email Newsletter, Email Marketing, Landing Pages and Membership plugin safe to use?
All 8 known issues are fixed in current versions (3.5.1 or later). Keeping it updated is what matters.
How do I check which version of Kit (formerly ConvertKit) – Email Subscribers, Email Newsletter, Email Marketing, Landing Pages and Membership 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.