In Vendure admin-ui before 2.0.3 While the WYSIWYG editor allows limited customization, altering the request data (not in the ui) saves and returns arbitrary HTML with no sanitization. Causing an XSS when viewing the page. The impact of this XSS is privilege escalation. A user that can write any type of description can trigger the attack. Then any other user that visits the vulnerable page is prone to arbitrary Javascript code execution, giving the attacker ability to execute actions on behalf of this user.