ProfilePress < 4.15.6 - Contributor+ Stored Cross-Site Scripting via 'reg-single-checkbox'

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the plugin's 'reg-single-checkbox' shortcode in all versions up to, and including, 4.15.5 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.