During a security research I found an authenticated Stored XSS vulnerability.
The name of the plugin is: Advanced Comment Form < 1.2.1
The plugin does not sanitise and escape its settings, allowing high privilege users such as admin to perform cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.
The PoC will be displayed on September 29, 2022, to give users the time to update.
Plugin has more than 6,000+ active installations.