# Forminator Forms <= 1.58.3 - Unauthenticated Sensitive Information Exposure via Stripe Checkout After-Payment Response

- **ID:** WPSEC-2026-2182
- **Plugin:** Forminator Forms – Contact Form, Payment Form & Custom Form Builder (`forminator`), https://wordpress.org/plugins/forminator/
- **Affected versions:** all versions before 1.58.4
- **Fixed in:** 1.58.4 (Update to 1.58.4 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/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/forminator
- **Fix released:** 2026-11-02
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2182/

## Description

The Forminator Forms plugin for WordPress is vulnerable to Sensitive Information Exposure via the Stripe Checkout pending-entry response in all versions up to, and including, 1.58.3. This is due to the plugin returning the form's after-payment behavior (thank-you message or redirect URL) for a pending entry based only on the payment-owner browser token, without confirming that the Stripe Checkout Session was completed. This makes it possible for unauthenticated attackers to start a checkout and then receive the post-payment message or redirect URL, which may give access to content gated behind payment, without paying.

## References

- https://wpsec.com/vuln/WPSEC-2026-2182/
- https://plugins.svn.wordpress.org/forminator/tags/1.58.4/
- https://wordpress.org/plugins/forminator/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2182/

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.