Auth bypass in Wpengine Advanced Custom Fields (Acf®)
CVE-2026-4812
The Advanced Custom Fields (ACF) plugin for WordPress is vulnerable to Missing Authorization to Arbitrary Post/Page Disclosure in versions up to and including 6.7.0. This is due to AJAX field query endpoints accepting user-supplied filter…
Vulnerability class: Broken Access Control
EPSS: 0.000 (7.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Wpengine Advanced Custom Fields (Acf®) — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/51e3a976-a1a3-411a-b88c-f1cb2…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/f…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/f…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/f…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/f…
- plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields…
Frequently asked questions
- What is CVE-2026-4812?
- CVE-2026-4812 is a medium-severity vulnerability in Wpengine Advanced Custom Fields (Acf®), classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-04-15.
- How severe is CVE-2026-4812?
- Medium severity. CVSS v3 base score is 5.3 out of 10.