# Advanced Custom Fields (ACF®) <= 6.8.10 - Authenticated (Subscriber+) Sensitive Information Exposure via Relational Field Search

- **ID:** WPSEC-2026-2422
- **Plugin:** Advanced Custom Fields (ACF®) (`advanced-custom-fields`), https://wordpress.org/plugins/advanced-custom-fields/
- **Affected versions:** all versions before 6.8.11
- **Fixed in:** 6.8.11 (Update to 6.8.11 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-200
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-03)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/advanced-custom-fields
- **Fix released:** 2026-11-02
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2422/

## Description

The Advanced Custom Fields (ACF®) plugin for WordPress is vulnerable to Sensitive Information Exposure via the Relationship, Post Object and Page Link field AJAX search in all versions up to, and including, 6.8.10. This is due to the search relying on WP_Query's perm=readable, which only excludes private posts, so other users' drafts, pending and scheduled posts, and attachments whose parent post the user cannot read were still returned, and to selected posts being rendered by title without a read check. This makes it possible for authenticated attackers with subscriber-level access and above, who can reach a relational field's search, to list the titles of posts they are not allowed to read.

## References

- https://wpsec.com/vuln/WPSEC-2026-2422/
- https://plugins.svn.wordpress.org/advanced-custom-fields/tags/6.8.11/
- https://wordpress.org/plugins/advanced-custom-fields/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2422/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.