As immediate action, update the affected plugin. If you're unable to do so, ask your hosting provider or web developer for help.
Logged-in users can be tricked into performing actions they didn't intend, like changing passwords or making purchases.
CVSS score is a way to evaluate and rank reported vulnerabilities in a standardized and repeatable way but which is not ideal for WordPress.
This security issue has a low severity impact and is unlikely to be exploited.
Update to version 4.3.3 or later to resolve the vulnerability.
This software was last updated over a year ago and will likely not receive further updates or patches. Note that deactivating the software does not remove the security threat unless mitigation rule by Patchstack is deployed.