WP-WebAuthn < 1.3.4 - Contributor+ Stored XSS via wwa_login_form Shortcode

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the plugin's wwa_login_form shortcode 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.