Checkout verification bypass via reusable Turnstile approval
Published Jun 15, 2026 · Updated Jun 15, 2026
Broken authentication in RelyWP Simple CAPTCHA with Cloudflare Turnstile 1.38.0 and earlier allows remote attackers to bypass WooCommerce checks. The WooCommerce checkout integration treated a nonce stored in a PHP session as proof that Turnstile had already succeeded, so later checks in that session skipped Cloudflare verification. No account is required, but exploitation requires protected WooCommerce checkout and one valid Turnstile solve; replay permits repeated submissions without fresh human verification.
Summary
What happened
Broken authentication in RelyWP Simple CAPTCHA with Cloudflare Turnstile 1.38.0 and earlier allows remote attackers to bypass WooCommerce checks. The WooCommerce checkout integration treated a nonce stored in a PHP session as proof that Turnstile had already succeeded, so later checks in that session skipped Cloudflare verification. No account is required, but exploitation requires protected WooCommerce checkout and one valid Turnstile solve; replay permits repeated submissions without fresh human verification.
The record
- CVE
- CVE-2026-40799
- Published
- Jun 15, 2026
- Updated
- Jun 15, 2026
- Vendor
- RelyWP
- Product
- Simple CAPTCHA with Cloudflare Turnstile
- Classifications
- CWE-288, CAPEC-50, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 15, 2026CVE publishedPublication date reported by the CVE source.
- Jun 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a <=1.38.0 changes=[{"at":"1.38.1","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Atomic Edge CVE-2026-40799 proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo