What’s Vulnerable › Vulnerabilities
CVE-2026-15239: Simple CAPTCHA with Cloudflare Turnstile < 1.42.0 - Unauthenticated Turnstile Protection Bypass via Reusable Forminator Cache Key
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-07 · updated 2026-08-26
- Weakness: CWE-345
Description
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 request value, allowing unauthenticated attackers to solve one challenge and then replay token-less form submissions for a short window, defeating the anti-abuse protection the plugin provides.
Affected products
- Simple CAPTCHA with Cloudflare Turnstile: before 1.42.0 — fixed in 1.42.0
How to fix
Upgrade to a fixed version: Simple CAPTCHA with Cloudflare Turnstile 1.42.0. Check the vendor advisory for mitigations.
References
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