What the vulnerability does
01Description
The hCaptcha for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's cf7-hcaptcha shortcode in all versions up to, and including, 4.0.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
The hCaptcha for WP plugin through version 4.0.0 contains a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other site visitors, potentially compromising their sessions or stealing sensitive data. The vulnerability affects the plugin's handling of user-supplied input without proper sanitization.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers when they visit the site.
Potential impact on your site
04Site Impact
Visitors' sessions and data can be compromised; site reputation and user trust at risk.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
April 20, 2024
CVE published
April 8, 2026
Record updated
