Medium severity · published Sep 10, 2026
CVE-2026-66674
WordPress Simple Cloudflare Turnstile plugin <= 1.42.1 - Captcha Bypass vulnerability
5.6
CVSS
0.3%
EPSS
No
On KEV
Description
Unauthenticated Bypass Vulnerability in Simple Cloudflare Turnstile <= 1.42.1 versions.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Simple Cloudflare Turnstile · Elliot Sowers/ RelyWP
through 1.42.1 · source: vendor
Affected product
SC
Simple Cloudflare Turnstile
Elliot Sowers/ RelyWP
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66674
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66674
patchstack.com
https://patchstack.com/database/wordpress/plugin/simple-cloudflare-turnstile/vulnerability/wordpress-simple-cloudflare-turnstile-plugin-1-42-1-captcha-bypass-vulnerability?_s_id=cve
More from Simple Cloudflare Turnstile
6.5
CVE-2026-66632
WordPress Simple Cloudflare Turnstile plugin <= 1.42.1 - Content Injection vulnerability