# SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz <= 2.13.0 - Unauthenticated reCAPTCHA v3 Bypass via Missing Score Validation

- **ID:** WPSEC-2026-2547
- **Plugin:** SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz (`sureforms`), https://wordpress.org/plugins/sureforms/
- **Affected versions:** all versions before 2.13.1
- **Fixed in:** 2.13.1 (Update to 2.13.1 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-693
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-05)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/sureforms
- **Fix released:** 2026-11-04
- **Published:** 2026-11-05
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2547/

## Description

The SureForms plugin for WordPress is vulnerable to a CAPTCHA protection bypass via the reCAPTCHA v3 check on form submissions in all versions up to, and including, 2.13.0. Server-side verification accepted any siteverify response with success set to true and never compared the v3 score to a threshold. This makes it possible for unauthenticated attackers, such as automated bots that obtain a low-scoring v3 token, to bypass the spam protection the site owner enabled on a form and submit entries at will.

## References

- https://wpsec.com/vuln/WPSEC-2026-2547/
- https://plugins.svn.wordpress.org/sureforms/tags/2.13.1/
- https://wordpress.org/plugins/sureforms/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2547/

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.