WordPress Simple Cloudflare Turnstile plugin <= 1.42.1 - Captcha Bypass vulnerability

published 2026-09-10 1 mo ago modified 2026-09-10 59 d ago also EUVD-2026-75512

cvss: 5.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

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

Patch / fix

fixed in 1

Elliot Sowers/ RelyWP Simple Cloudflare Turnstile 1.42.3

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 59 d ago (2026-09-10)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.6	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected products

Elliot Sowers/ RelyWP Simple Cloudflare Turnstile

Classification

Weakness

CWE-290 Authentication Bypass by Spoofing

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/wordpress/plugin/simple-cloudflare-turnstile/vulnerability/wordpress-simple-cloudflare-turnstile-plu
vdb-entry

Sources

CVE List CVE-2026-66674
NVD CVE-2026-66674

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary