# Alpha Addons for Gravity Forms <= 1.0.3 - Unauthenticated CAPTCHA Bypass via Math Captcha Field

- **ID:** WPSEC-2026-1906
- **Plugin:** Alpha Addons for Gravity Forms (`alpha-addons-for-gravity-forms`), https://wordpress.org/plugins/alpha-addons-for-gravity-forms/
- **Affected versions:** all versions before 1.0.4
- **Fixed in:** 1.0.4 (Update to 1.0.4 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-294
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/alpha-addons-for-gravity-forms
- **Fix released:** 2026-10-28
- **Published:** 2026-10-29
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1906/

## Description

The Alpha Addons for Gravity Forms plugin for WordPress is vulnerable to CAPTCHA bypass via the Math Captcha field in all versions up to, and including, 1.0.3, due to the captcha hash being derived only from the numeric answer and a site-wide secret. The hash never expires, is not tied to the question shown, and is not invalidated after use. This makes it possible for unauthenticated attackers to replay one solved answer and hash pair without limit and submit forms protected by the Math Captcha field automatically.

## References

- https://wpsec.com/vuln/WPSEC-2026-1906/
- https://plugins.svn.wordpress.org/alpha-addons-for-gravity-forms/tags/1.0.4/
- https://wordpress.org/plugins/alpha-addons-for-gravity-forms/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1906/

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.