CVE-2026-4812: medium-severity vulnerability in wpengine Advanced Custom Fields (ACF®)
Advanced Custom Fields (ACF®) <= 6.7.0 - Unauthenticated Missing Authorization to Arbitrary Post/Page Disclosure via AJAX Field Query Parameters
Published
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 0.9%
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 parameters that override field-configured restrictions without proper authorization checks. This makes it possible for unauthenticated attackers with access to a frontend ACF form to enumerate and disclose information about draft/private posts, restricted post types, and other data that should be restricted by field configuration.
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®)Related CVEs — wpengine Advanced Custom Fields (ACF®)
In the same product, most dangerous first.
CVE-2023-6701MEDIUMAdvanced Custom Fields <= 6.2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom FieldEPSS 0.5%CVE-2026-8382MEDIUMAdvanced Custom Fields (ACF®) <= 6.8.1 - Unauthenticated Arbitrary Post Modification via Front-End Form '_post_title' and '_post_content' ParametersEPSS 0.5%
References
https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-page_link.php#L144https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-post_object.php#L155https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-post_object.php#L92https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L118https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L171https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L180https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-relationship.php#L187https://plugins.trac.wordpress.org/browser/advanced-custom-fields/tags/6.7.0/includes/fields/class-acf-field-user.php#L435https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-page_link.php#L144https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-post_object.php#L155https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-post_object.php#L92https://plugins.trac.wordpress.org/browser/advanced-custom-fields/trunk/includes/fields/class-acf-field-relationship.php#L118