CVE-2026-93766 · Package
NO FIX YET · SEE WHAT TO DO
The Happyforms Pro plugin for WordPress fails to sanitize the happyforms_client_referer parameter, so unauthenticated visitors can store scripts that run in pages. An attacker gets script execution in the browser of anyone who opens an affected page, including logged-in site administrators.
first public Nov 7, 2026 · 1 source
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Sites running the Happyforms Pro plugin for WordPress at version 1.38.9 or earlier are exposed. The flaw is reachable without an account through the form referer parameter, so any site using the plugin's forms should be reviewed. Sites without this plugin can skip it.
Not affected if newer-version, plugin-not-installed
Who cares happyforms-pro, self-hosted, wordpress
1.38.9.The Happyforms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'happyforms_client_referer' parameter in all versions up to, and including, 1.38.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
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