Unauthenticated Bypass in hCaptcha for WP

Executive Summary

CVE-2026-103347 is an unauthenticated bypass vulnerability in the WordPress hCaptcha for WP plugin versions 5.3.0 and earlier. It allows attackers to bypass security checks as if they were not present, though it is considered low severity with no significant impact.

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Detection Guidance

Check the installed version of the hCaptcha for WP plugin. If it is version 5.3.0 or earlier, the system is vulnerable. Use WordPress admin panel or run a command like 'wp plugin list' if using WP-CLI to verify the version.

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Impact Analysis

This vulnerability allows attackers to bypass security checks without authentication. However, it is classified as low severity with no significant impact. Users should update to version 5.4.0 or later to mitigate the risk.

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Compliance Impact

The vulnerability allows unauthenticated bypass of security checks, which could potentially lead to unauthorized access or data exposure. This may impact compliance with standards like GDPR or HIPAA by increasing the risk of data breaches or unauthorized processing of personal data.

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Mitigation Strategies

Update the hCaptcha for WP plugin to version 5.4.0 or later immediately. Enable auto-updates for the plugin if available to prevent future vulnerabilities.

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