Kitgenix CAPTCHA for Cloudflare Turnstile <= 2.1.4 - Unauthenticated CAPTCHA Bypass via Non-Canonical Login URL
- ID
- WPSEC-2026-2265
- Plugin
- Kitgenix CAPTCHA for Cloudflare Turnstile (kitgenix-captcha-for-cloudflare-turnstile)
- Affected
- from 1.1.0 before 2.2.0
- Remediation
- Update to 2.2.0 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-647
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-03
- Attack surface
- Kitgenix CAPTCHA for Cloudflare Turnstile on WPSec AttackSurface
- Fix released
- Published
Description
The Kitgenix CAPTCHA for Cloudflare Turnstile plugin for WordPress is vulnerable to a CAPTCHA Bypass via the WordPress login form in all versions from 1.1.0 up to, and including, 2.1.4. This is due to the login check deciding whether a request is a wp-login.php login by comparing the raw REQUEST_URI path with the path of wp_login_url(), and skipping Turnstile verification when the two differ and no Turnstile fields are posted. Web servers still run wp-login.php for non-canonical forms of the path such as '//wp-login.php', '/./wp-login.php' or '/wp%2Dlogin.php', but those forms do not match the comparison. This makes it possible for unauthenticated attackers to submit login attempts without solving the Turnstile challenge, so they can run automated brute-force and credential-stuffing attacks that the CAPTCHA is meant to block.
References
- https://wpsec.com/vuln/WPSEC-2026-2265/
- https://plugins.svn.wordpress.org/kitgenix-captcha-for-cloudflare-turnstile/tags/2.2.0/
- https://wordpress.org/plugins/kitgenix-captcha-for-cloudflare-turnstile/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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