ShopLentor < 2.8.2 - Contributor+ Stored XSS

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the plugin's 'wishsuite_button' shortcode due to insufficient input sanitization and output escaping on user supplied attributes like 'button_class'. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.