CVE-2026-15827mediumCWE-862

CVE-2026-15827: medium-severity vulnerability in ataurr GutenKit – Page Builder Blocks…

GutenKit <= 2.4.12 - Missing Authorization to Unauthenticated Sensitive Information Exposure via Mailchimp REST Endpoints

Published

Follow this CVE+ Monitor GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.3epss 0.5%
The GutenKit Blocks plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the /wp-json/gutenkit/v1/mailchimp/get/lists and /wp-json/gutenkit/v1/mailchimp/get/interests REST API endpoints in versions up to, and including, 2.4.12. Both endpoints are registered with permission_callback => '__return_true', and their callbacks read the site's stored Mailchimp API key from the gutenkit_settings_list option and proxy Mailchimp audience/list, merge-field, interest-category, interest-name, and subscriber-count metadata back to the caller with no login, nonce, or capability check. This makes it possible for unauthenticated attackers to retrieve private Mailchimp audience configuration information from any site that has configured the GutenKit Mailchimp integration.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
ataurr · GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor
Related CVEs — ataurr GutenKit – Page Builder Blocks…

In the same product, most dangerous first.

CVE-2024-9234CRITICALGutenKit <= 2.1.0 - Unauthenticated Arbitrary File UploadEPSS 10.4%CVE-2026-2573MEDIUMGutenKit <= 2.4.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'postBodyCss'EPSS 0.3%