# reCAPTCHA for WooCommerce <= 1.4.7 - Unauthenticated CAPTCHA Bypass via WooCommerce Login Form

- **ID:** WPSEC-2026-2836
- **Plugin:** reCAPTCHA for WooCommerce (`recaptcha-woo`), https://wordpress.org/plugins/recaptcha-woo/
- **Affected versions:** from 1.1.0 before 1.5.0
- **Fixed in:** 1.5.0 (Update to 1.5.0 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 2026-11-10)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/recaptcha-woo
- **Fix released:** 2026-11-09
- **Published:** 2026-11-10
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2836/

## Description

The reCAPTCHA for WooCommerce plugin for WordPress is vulnerable to a CAPTCHA bypass via the WooCommerce login form in all versions up to, and including, 1.4.7. This is due to the login check only running when the 'woocommerce-login-nonce' field is present, although WooCommerce also accepts the login nonce as '_wpnonce'. The check is also skipped for any request sent to xmlrpc.php, where WooCommerce still processes a posted login form. This makes it possible for unauthenticated attackers to make WooCommerce login attempts without solving the reCAPTCHA, which enables automated brute-force attacks.

## References

- https://wpsec.com/vuln/WPSEC-2026-2836/
- https://plugins.svn.wordpress.org/recaptcha-woo/tags/1.5.0/
- https://wordpress.org/plugins/recaptcha-woo/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2836/

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.