Gutenberg Blocks with AI by Kadence WP Plugin up to 3.6.1 on WordPress REST API get_items endpoint server-side request forgery

Summaryinfo

A vulnerability, which was classified as critical, was found in Gutenberg Blocks with AI by Kadence WP Plugin up to 3.6.1 on WordPress. Affected by this vulnerability is the function get_items of the component REST API Handler. Executing a manipulation of the argument endpoint can lead to server-side request forgery. This vulnerability is registered as CVE-2026-1857. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Gutenberg Blocks with AI by Kadence WP Plugin up to 3.6.1 on WordPress. It has been declared as critical. This vulnerability affects the function get_items of the component REST API Handler. The manipulation of the argument endpoint with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at wordfence.com. This vulnerability was named CVE-2026-1857. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/18/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Name

• Gutenberg Blocks with AI by Kadence WP Plugin

Version

• 3.6.0
• 3.6.1

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CPE 2.2info

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