MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. vulnerabilities
Plugin slug mailoptin · 8 known vulnerabilities · latest disclosed 2026-10-15 · WordPress.org page
Every listed vulnerability has a fix. Version 1.2.78.7 or later is not affected by any of them. If your site runs an older version, update it.
3 of 8 rated high or critical (CVSS 7 or more).
Known vulnerabilities in MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Critical 9.8 | <= 1.2.78.6 | 1.2.78.7 | CVE-2026-109515 | 2026-10-15 | Advisory |
| Medium 6.4 | <= 1.2.78.0 | 1.2.78.1 | CVE-2026-66703 | 2026-07-29 | Advisory |
| Critical 9.8 | <= 1.2.77.3 | 1.2.78.0 | CVE-2026-57813 | 2026-07-09 | Advisory |
| Medium 4.4 | <= 1.2.75.0 | 1.2.75.1 | CVE-2025-58596 | 2025-09-03 | Advisory |
| Medium 5.4 | <= 1.2.70.3 | 1.2.70.4 | CVE-2024-8628 | 2024-09-23 | Advisory |
| Medium 5.5 | 1.2.54.0 | 1.2.54.1 | CVE-2023-23980 | 2023-01-20 | Advisory |
| Medium 5.3 | <= 1.2.49.0 | 1.2.50.0 | CVE-2022-36340 | 2022-09-23 | Advisory |
| High 7.3 | <= 1.2.35.1 | 1.2.35.2 | none | 2021-06-30 | Advisory |
Check if a site is affected
Enter a site address to see which version of MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. plugin safe to use?
All 8 known issues are fixed in current versions (1.2.78.7 or later). Keeping it updated is what matters.
How do I check which version of MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. 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.