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CVE-2026-15827— GutenKit <= 2.4.12 - Missing Authorization to Unauthenticated Sensitive Information Exposure via Mailchimp REST Endpoints

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-15827

Vulnerability Information
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Vulnerability Title
GutenKit <= 2.4.12 - Missing Authorization to Unauthenticated Sensitive Information Exposure via Mailchimp REST Endpoints
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
ataurrGutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor 0 ~ 2.4.12 -

II. Public POCs for CVE-2026-15827

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III. Intelligence Information for CVE-2026-15827

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Patches & Fixes for CVE-2026-15827 (5)

Vendor Pages for CVE-2026-15827 (1)

Other References for CVE-2026-15827 (1)

Other References for CVE-2026-15827 (1)

IV. Related Vulnerabilities

Same product: GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor
Same vendor: ataurr
Same weakness: CWE-862

V. Comments for CVE-2026-15827

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