Vulnerability in Elliot Sowers/ Relywp Simple Cloudflare Turnstile

CVE-2026-66674

Unauthenticated Bypass Vulnerability in Simple Cloudflare Turnstile <= 1.42.1 versions.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (16.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-66674: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-66674?
CVE-2026-66674 is a medium-severity vulnerability in Elliot Sowers/ Relywp Simple Cloudflare Turnstile, classified under Authentication Bypass by Spoofing. CVSS score: 5.6/10. Published 2026-09-10.
How severe is CVE-2026-66674?
Medium severity. CVSS v3 base score is 5.6 out of 10.