Kubio AI Page Builder < 2.9.3 - Unauthenticated Stored XSS via Comment Content

Description

The plugin does not limit its widening of the allowed HTML elements to the editor context, so the wider set is applied when filtering content submitted by unauthenticated users as well, allowing them to store markup which the plugin's own script later executes in the browser of any visitor, or of an administrator reviewing the still-unapproved submission.