CVE-2026-85116
Received Received - Intake

Arbitrary Shortcode Execution in Simple CAPTCHA with Cloudflare Turnstile WordPress Plugin

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: WPScan

Description
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.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-85116
EUVD
EUVD-2026-76039

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
simple_captcha cloudflare_turnstile to 1.42.3 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the Simple CAPTCHA with Cloudflare Turnstile WordPress plugin versions 1.2.2 to 1.42.1. It allows unauthenticated users to execute arbitrary shortcodes by submitting values through Contact Form 7 forms. The plugin incorrectly parses these submitted values, enabling code injection.

Detection Guidance

Check the installed version of the Simple CAPTCHA with Cloudflare Turnstile plugin. If it is between 1.2.2 and 1.42.1, the system is vulnerable. Use WordPress admin panel or run a command like 'wp plugin list' if using WP-CLI to verify the version.

Impact Analysis

An attacker could exploit this to run malicious shortcodes on your WordPress site, potentially leading to unauthorized actions, data theft, or further compromise of your website or server. It may also allow attackers to bypass security controls.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements. For HIPAA, it may risk protected health information exposure, potentially breaching compliance.

Mitigation Strategies

Update the Simple CAPTCHA with Cloudflare Turnstile plugin to version 1.42.3 or later immediately to patch the vulnerability. Disable Contact Form 7 field repopulation if not required as a temporary workaround.

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