What is CVE-2026-15239?

CVE-2026-15239 is a medium-severity vulnerability in Simple Captcha With Cloudflare Turnstile, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-08-07.

How severe is CVE-2026-15239?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Simple Captcha With Cloudflare Turnstile

CVE-2026-15239

The Simple CAPTCHA with Cloudflare Turnstile WordPress plugin before 1.42.0 does not bind its Turnstile validation cache to the single-use challenge token in its Forminator integration, instead keying it to an attacker-controlled, reusable…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Unknown Simple Captcha With Cloudflare Turnstile — versions 0

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-15239?: CVE-2026-15239 is a medium-severity vulnerability in Simple Captcha With Cloudflare Turnstile, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-08-07.
How severe is CVE-2026-15239?: Medium severity. CVSS v3 base score is 5.3 out of 10.