WordPress plugin
MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 8 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical2
- High1
- Medium5
- Low0
All MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Critical9.8 | Unauthenticated Privilege Escalation to 'form_custom_field_mappings' Parameter ≤1.2.78.6Update to 1.2.78.7 | CVE-2026-109515 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤1.2.78.0Update to 1.2.78.1 | CVE-2026-66703 | |
| Critical9.8 | Unauthenticated Privilege Escalation ≤1.2.77.3Update to 1.2.78.0 | CVE-2026-57813 | |
| Medium4.4 | Authenticated (Administrator+) Stored Cross-Site Scripting ≤1.2.75.0Update to 1.2.75.1 | CVE-2025-58596 | |
| Medium5.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤1.2.70.3Update to 1.2.70.4 | CVE-2024-8628 | |
| Medium5.5 | Authenticated (Admin+) Cross Site Scripting 1.2.54.0 – 1.2.54.0Update to 1.2.54.1 | CVE-2023-23980 | |
| Medium5.3 | Missing Authorization to Cache Deletion ≤1.2.49.0Update to 1.2.50.0 | CVE-2022-36340 | |
| High7.3 | Authorization Bypass ≤1.2.35.1Update to 1.2.35.2 | — |
- Critical9.8Unauthenticated Privilege Escalation to 'form_custom_field_mappings' Parameter
≤1.2.78.6Update to 1.2.78.7
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤1.2.78.0Update to 1.2.78.1
- Critical9.8Unauthenticated Privilege Escalation
≤1.2.77.3Update to 1.2.78.0
- Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting
≤1.2.75.0Update to 1.2.75.1
- Medium5.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤1.2.70.3Update to 1.2.70.4
- Medium5.5Authenticated (Admin+) Cross Site Scripting
1.2.54.0 – 1.2.54.0Update to 1.2.54.1
- Medium5.3Missing Authorization to Cache Deletion
≤1.2.49.0Update to 1.2.50.0
- High7.3Authorization Bypass
≤1.2.35.1Update to 1.2.35.2
MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.: common questions
Does MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. have known vulnerabilities?
Yes. VulnCrest Radar lists 8 known vulnerabilities in MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.: 2 critical, 1 high, 5 medium. None are known to affect version null.
How do I check which version of MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. 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 MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. vulnerability?
CVE-2026-109515, published Oct 15, 2026: MailOptin <= 1.2.78.6 - Unauthenticated Privilege Escalation to 'form_custom_field_mappings' Parameter. Severity: Critical (CVSS 9.8).
Is any MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. vulnerability listed in CISA KEV?
No. None of the known MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. vulnerabilities is currently listed in the CISA KEV catalog.