Simple CAPTCHA with Cloudflare Turnstile <= 1.44.0 - Unauthenticated CAPTCHA Bypass via Contact Form 7 Turnstile Form-Tag
- ID
- WPSEC-2026-1908
- Plugin
- Simple CAPTCHA with Cloudflare Turnstile (simple-cloudflare-turnstile)
- Affected
- all versions before 1.44.1
- Remediation
- Update to 1.44.1 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-807
- Usage
- Plugin Medium · Affected versions Medium among sites WPSec scans, 2026-10-29
- Attack surface
- Simple CAPTCHA with Cloudflare Turnstile on WPSec AttackSurface
- Fix released
- Published
Description
The Simple CAPTCHA with Cloudflare Turnstile plugin for WordPress is vulnerable to CAPTCHA Bypass via the Contact Form 7 Turnstile form-tag integration in all versions up to, and including, 1.44.0. This is due to the plugin deciding whether a submitted form uses the Turnstile form-tag from the user-supplied '_wpcf7' POST field, instead of from the form Contact Form 7 is actually processing. This makes it possible for unauthenticated attackers to submit Contact Form 7 forms protected with the form-tag without solving Turnstile, by leaving out that field or pointing it at another form. Sites using the 'Enable on all CF7 Forms' option are not affected.
References
- https://wpsec.com/vuln/WPSEC-2026-1908/
- https://plugins.svn.wordpress.org/simple-cloudflare-turnstile/tags/1.44.1/
- https://wordpress.org/plugins/simple-cloudflare-turnstile/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
This advisory as JSON or Markdown · All advisories: JSON, RSS