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TI-2026-12829 Aliases CVE-2026-15239GHSA-w6f5-3mw7-jjxq

Insufficient verification of data authenticity in Simple CAPTCHA with Cloudflare Turnstile

Priority MEDIUM 63CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00158 4th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Simple CAPTCHA with Cloudflare Turnstile (Unknown): 1.42.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownSimple CAPTCHA with Cloudflare Turnstilebefore 1.42.01.42.0Patch availableCNA
  • Simple CAPTCHA with Cloudflare Turnstile VendorUnknown Affected before 1.42.0 Fixed in 1.42.0 Patch available CNA

Remediation

  • Fix · CNA Simple CAPTCHA with Cloudflare Turnstile (Unknown) Fixed in 1.42.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15239
  2. 2026-10-03 Alias added: GHSA-w6f5-3mw7-jjxq

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences