Gutenberg Blocks by Kadence Blocks – Page Builder Features, CVE-2026-1857

CVE, Research URL: CVE-2026-1857
Home page URL: Security reports for Gutenberg Blocks by Kadence Blocks – Page Builder Features
Application: Gutenberg Blocks by Kadence Blocks – Page Builder Features
Published on: Feb 18, 2026
Research Description: The Gutenberg Blocks with AI by Kadence WP plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.6.1. This is due to insufficient validation of the `endpoint` parameter in the `get_items()` function of the GetResponse REST API handler. The endpoint's permission check only requires `edit_posts` capability (Contributor role) rather than `manage_options` (Administrator). This makes it possible for authenticated attackers, with Contributor-level access and above, to make server-side requests to arbitrary endpoints on the configured GetResponse API server, retrieving sensitive data such as contacts, campaigns, and mailing lists using the site's stored API credentials. The stored API key is also leaked in the request headers.
Affected versions: max 3.6.2.
Status: vulnerable