WordPress hCaptcha for WP Plugin <= 4.21.1 is vulnerable to Broken Access Control

Low priority No impactful threat
<= 4.21.1Vulnerable version(s)
4.22.0Patched version
WordPress Plugin
No VDP
26 Jan, 2026 by Patchstack

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Risks

CVSS 5.3

As immediate action, update the affected plugin. If you're unable to do so, ask your hosting provider or web developer for help.

Note by Patchstack

The vulnerability is limited to the CAPTCHA mechanism intended to protect a publicly accessible form from automated abuse. It does not impact WordPress-level authentication or authorization controls.

5.3

Broken Access Control

Users can access pages or perform actions they shouldn't be allowed to, like viewing other people's data.

CVSS score is a way to evaluate and rank reported vulnerabilities in a standardized and repeatable way but which is not ideal for WordPress.

Solutions

This security issue has a low severity impact and is unlikely to be exploited.

Update to version 4.22.0 or later.

Update to version 4.22.0 or later to resolve the vulnerability. Patchstack users can turn on auto-update for vulnerable plugins only.

Details

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WordPress Plugin
No VDP

Timeline

Reported byProfile Imagedragonzen

27 Dec, 2025

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