# Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.58.0 - Unauthenticated Missing Authorization to AWeber Subscriber Modification

- **ID:** WPSEC-2026-0821
- **Plugin:** Forminator Forms – Contact Form, Payment Form & Custom Form Builder (`forminator`), https://wordpress.org/plugins/forminator/
- **Affected versions:** all versions before 1.58.1
- **Fixed in:** 1.58.1 (Update to 1.58.1 or later.)
- **Severity:** Low 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-10-13)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/forminator
- **Fix released:** 2026-10-12
- **Published:** 2026-10-13
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0821/

## Description

The Forminator Forms plugin for WordPress is vulnerable to unauthorized modification of data via the AWeber integration in all versions up to, and including, 1.58.0 due to a missing authorization check when updating an existing subscriber and unrestricted tag removal. This makes it possible for unauthenticated attackers to submit a form with another person's e-mail address to overwrite that existing AWeber subscriber's fields and tags, including removing tags not managed by the form connection. Exploitation requires a form connected to the AWeber integration.

## References

- https://wpsec.com/vuln/WPSEC-2026-0821/
- https://plugins.svn.wordpress.org/forminator/tags/1.58.1/
- https://wordpress.org/plugins/forminator/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0821/

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.