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6.5
Unauthorized users can delete Brevo plugin settings on WordPress sites
CVE-2025-14799
Summary
An attacker can delete Brevo plugin settings, disconnect the Brevo integration, and delete subscription forms on a WordPress site without being authorized. This can happen if the Brevo plugin is not updated to a version newer than 3.3.0. To fix this, update the Brevo plugin to the latest version.
Original title
The Brevo - Email, SMS, Web Push, Chat, and more. plugin for WordPress is vulnerable to authorization bypass due to type juggling in all versions up to, and including, 3.3.0. This is due to the use...
Original description
The Brevo - Email, SMS, Web Push, Chat, and more. plugin for WordPress is vulnerable to authorization bypass due to type juggling in all versions up to, and including, 3.3.0. This is due to the use of loose comparison (==) instead of strict comparison (===) when validating the installation ID in the `/wp-json/mailin/v1/mailin_disconnect` REST API endpoint. This makes it possible for unauthenticated attackers to disconnect the Brevo integration, delete the API key, remove all subscription forms, and reset plugin settings by sending a boolean `true` value for the `id` parameter, which bypasses the authorization check through PHP type juggling.
nvd CVSS3.1
6.5
Vulnerability type
CWE-843
Type Confusion
- https://plugins.trac.wordpress.org/browser/mailin/tags/3.2.9/sendinblue.php#L179...
- https://plugins.trac.wordpress.org/browser/mailin/tags/3.2.9/sendinblue.php#L183...
- https://plugins.trac.wordpress.org/changeset/3448639/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f29e5b19-2505-4b02-92c...
Published: 18 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026