While this vulnerability can be initiated by the role shown in "Required Privilege", successful exploitation requires a privileged user to perform an action — such as clicking a malicious link, visiting a crafted page, or submitting a form.

This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site.

CVSS score is a way to evaluate and rank reported vulnerabilities in a standardized and repeatable way but which is not ideal for WordPress.