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Simple CAPTCHA with Cloudflare Turnstile vulnerabilities

Simple CAPTCHA with Cloudflare Turnstile has 3 known vulnerabilities in this database. The most recent published record is dated 11 Sep 2026.

Known vulnerabilities
3
Active installs
200,000+
Latest version
1.44.0
Last updated
29 Sep 2026
Most recent
11 Sep 2026

Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.

VulnerabilitySeverityAffectedFixPublished
Security weakness
CVE-2026-85116
Medium 6.5Before 1.42.3Fixed in 1.42.311 Sep 2026
Security weakness
CVE-2026-15239
Medium 5.3Before 1.42.0Fixed in 1.42.07 Aug 2026
Cross-site scripting (XSS)
CVE-2023-5135
Medium 6.4Before 1.23.2Fixed in 1.23.227 Sep 2023
Read the published descriptions
CVE-2026-85116, 11 Sep 2026
The Simple CAPTCHA with Cloudflare Turnstile WordPress plugin from 1.2.2 before 1.42.3 runs the shortcode parser over the whole rendered Contact Form 7 form, including the values a visitor submitted, allowing unauthenticated users to execute arbitrary shortcodes registered on the site. CVE record
CVE-2026-15239, 7 Aug 2026
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. CVE record
CVE-2023-5135, 27 Sep 2023
The Simple Cloudflare Turnstile plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'gravity-simple-turnstile' shortcode in versions up to, and including, 1.23.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. CVE record

What to do if you run Simple CAPTCHA with Cloudflare Turnstile

If you run Simple CAPTCHA with Cloudflare Turnstile, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.

If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.

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