CVE-2026-4812

Advanced Custom Fields (ACF®) <= 6.7.0 - Unauthenticated Missing Authorization to Arbitrary Post/Page Disclosure via AJAX Field Query Parameters

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.

We have discovered 5,195 live websites that are affected by CVE-2026-4812.

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Affected Software

Product  Advanced Custom Fields
Category Wordpress Plugins
Vulnerable Domains5,195 live websites (59% of Advanced Custom Fields install base)
Vulnerable Versions
  • from 0 through 6.7
Vulnerable Versions Count120 versions ( 91% of all versions)


Common Weakness Enumeration

CWE-862 Missing Authorization



Details

  • Published - Apr 15, 2026
  • Updated - Apr 15, 2026

Credits

  • Fernando Mecozzi (finder)

Website Distribution by Country

Number of websites using CVE-2026-4812
United States1,501 websites


France510 websites
Germany407 websites
GB390 websites
Russia239 websites
Netherlands153 websites
Italy148 websites
Canada148 websites
Switzerland119 websites
Spain116 websites

Website Distribution by TLD

Number of websites using CVE-2026-4812
.com1,920 websites
.org356 websites
.fr292 websites
.de238 websites
.co.uk213 websites
.ru178 websites
.nl135 websites
.it106 websites
.com.br97 websites
.net95 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-4812

Top websites that are affected by CVE-2026-4812. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
**********.com United States*,***
*********.com United States*,***
******************.org United States**,***
**************.com United States**,***
********.com United States**,***
*****.com United States**,***
************.org United States**,***
****.org United States**,***
*************.com United States**,***
************.pt Portugal**,***
See full domain list

FAQ

CVE-2026-4812 is Missing Authorization in Advanced Custom Fields
A total of 5,195 websites have been identified as vulnerable to CVE-2026-4812, based on global website indexing conducted by WebTechSurvey.
The Advanced Custom Fields is affected by the CVE-2026-4812 vulnerability.
Advanced Custom Fields versions up to and including 6.7 are vulnerable to CVE-2026-4812.

References