Simple Cloudflare Turnstile permits unauthenticated CAPTCHA bypass
Simple Cloudflare Turnstile through 1.42.1 has an unauthenticated bypass identified as CAPTCHA bypass by the export's advisory reference. An attacker can bypass the affected challenge check; the CNA rates attack complexity as high, without user interaction. This does not by itself establish WordPress account takeover.
- Component
- Simple Cloudflare Turnstile
- Plugin slug
simple-cloudflare-turnstile- Affected
- n/a through 1.42.1
- Safe version
1.42.3- Published
- Sep 10, 2026
This CVE was published Sep 10, 2026 and is one of 6 known issues for this plugin.
Update, patch or deactivate.
Update Simple Cloudflare Turnstile to 1.42.3 or later. The authoritative export explicitly marks this release unaffected by this vulnerability.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
Unauthenticated Bypass Vulnerability in Simple Cloudflare Turnstile <= 1.42.1 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L