MEDIUM 6.4 NVD
CVE-2026-4561
The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form response message post meta fields (e.g., 'text
The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form response message post meta fields (e.g., 'text_subscribed', 'text_error') in all versions up to, and including, 4.12.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
References
- https://plugins.trac.wordpress.org/browser/mailchimp-for-wp/trunk/includes/forms/class-for
- https://plugins.trac.wordpress.org/browser/mailchimp-for-wp/trunk/includes/forms/class-for
- https://plugins.trac.wordpress.org/browser/mailchimp-for-wp/trunk/includes/forms/class-for
- https://plugins.trac.wordpress.org/changeset/3491781/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/641b739d-f888-4327-b1c5-c95de39e
This medium severity vulnerability with a CVSS score of 6.4 was published on 2026-08-22 via NVD.
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