# Kirki <= 6.4.0 - Authenticated (Author+) Sensitive Information Exposure of User Email Addresses via User Search

- **ID:** WPSEC-2026-1931
- **Plugin:** Kirki – Freeform Page Builder, Website Builder & Customizer (`kirki`), https://wordpress.org/plugins/kirki/
- **Affected versions:** from 6.3.2 before 6.4.1
- **Fixed in:** 6.4.1 (Update to 6.4.1 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 Low, affected versions None seen (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/kirki
- **Fix released:** 2026-10-28
- **Published:** 2026-10-29
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1931/

## Description

The Kirki plugin for WordPress is vulnerable to Sensitive Information Exposure via the user collection, collection and comment mention user search features in all versions up to, and including, 6.4.0, due to the responses including user email addresses and roles, and the searches matching on user_email, without checking the list_users capability. This makes it possible for authenticated attackers with author-level access and above, who have Kirki builder content access by default, or holders of an editor preview link, to obtain or enumerate the email addresses and roles of site users.

## References

- https://wpsec.com/vuln/WPSEC-2026-1931/
- https://plugins.svn.wordpress.org/kirki/tags/6.4.1/
- https://wordpress.org/plugins/kirki/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1931/

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.