MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder <= 4.3.3 - Unauthenticated Stored Cross-Site Scripting via Form Field Values
| CVE | CVE-2026-15052 |
|---|---|
| CVSS | 7.2 (High) |
| Publicly Published | July 31, 2026 |
| Last Updated | August 1, 2026 |
| Researcher |
she11f
|
Description
The MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Form Field Values in all versions up to, and including, 4.3.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder
| Software Type | Plugin |
|---|---|
| Software Slug | mailchimp-subscribe-sm (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 4.3.4, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder
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