CVE detail
CVE-2026-15827
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 24.0 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 10
- within the 30d window
- Peak daily
- 10
- highest bucket
Evidence
Source links by recency
10 source links · newest first
- https://www.wordfence.com/threat-intel/vulnerabilities/id/7430594c-3a71-4b24-875b-014e03be868f?source=cvewww.wordfence.com
No excerpt available.
Patchwww.wordfence.comJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/changeset?reponame=&old=3618270%40gutenkit-blocks-addon&new=3618270%40gutenkit-blocks-addonplugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L62plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L43plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L17plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.6/includes/Routes/MailChimp.php#L141plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L62plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L43plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L17plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM - https://plugins.trac.wordpress.org/browser/gutenkit-blocks-addon/tags/2.4.11/includes/Routes/MailChimp.php#L141plugins.trac.wordpress.org
No excerpt available.
Patchplugins.trac.wordpress.orgJul 23, 2026, 10:16 AM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2026-66012CVSS 10.0 · Critical
SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check (model.CheckAuth) with no admin-r…
- CVE-2026-66027CVSS 8.7 · High
Suna before 0.9.102 contains a broken access control vulnerability in the message queue API that allows authenticated attackers to access and manipulate queue resources belonging…
- CVE-2026-49326CVSS 6.5 · Medium
Missing Authorization vulnerability in Apache HBase thrift and rest delegation service. A scan operation in thrift/rest service has 3 steps, open, fetch(possible multiple times),…
- CVE-2026-16799CVSS 5.0 · Medium
Improper access control in the automation tests and workflows features in Devolutions PowerShell Universal 2026.2.2 and earlier allows an authenticated user with only the Reader r…
- CVE-2026-10033CVSS 7.3 · High
The EventON Action User plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.5.14. This is due to the plugin not properly verifying t…
- CVE-2026-12654CVSS 5.3 · Medium
The Payment Plugins for Stripe WooCommerce plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.0.7. This is due to the plugin not pr…