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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-15827 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L141 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L17 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L43 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L62 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L141 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L17 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L43 Wordfence
https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L62 Wordfence
https://plugins.trac.wordpress.org/changeset?reponame=&old=3618270%40gutenkit-blocks-addon&new=3618270%40gutenkit-blocks-addon Wordfence
https://www.wordfence.com/threat-intel/vulnerabilities/id/7430594c-3a71-4b24-875b-014e03be868f?source=cve Wordfence

Weakness Enumeration

CWE-ID CWE Name Source
CWE-862 Missing Authorization Wordfence  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-15827
NVD Published Date:
07/23/2026
NVD Last Modified:
07/23/2026
Source:
Wordfence