# Redux Framework <= 4.5.15 - Authenticated (Subscriber+) Missing Authorization to Restricted Profile Field Update via 'checkuser_id' Parameter

- **ID:** WPSEC-2026-0909
- **Plugin:** Redux Framework (`redux-framework`), https://wordpress.org/plugins/redux-framework/
- **Affected versions:** from 4.4.1 before 4.5.16
- **Fixed in:** 4.5.16 (Update to 4.5.16 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-639
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-10-14)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/redux-framework
- **Fix released:** 2026-10-12
- **Published:** 2026-10-14
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0909/

## Description

The Redux Framework plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.5.15 due to the user profile field save routine checking field-level permissions against a user ID taken from the client-supplied 'checkuser_id' parameter instead of the current user. This makes it possible for authenticated attackers with Subscriber-level access and above to supply an administrator's user ID and save values to permission-restricted Redux profile fields that they should not be able to modify.

## References

- https://wpsec.com/vuln/WPSEC-2026-0909/
- https://plugins.svn.wordpress.org/redux-framework/tags/4.5.16/
- https://wordpress.org/plugins/redux-framework/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0909/

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.