As immediate action, update the affected plugin. If you're unable to do so, ask your hosting provider or web developer for help.
Similar CVE (Local File Inclusion via Post Meta): CVE-2024-3809
Attackers can make the site load server files it shouldn't, sometimes leading to takeover.
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 3.1.1 or later to resolve the vulnerability. Patchstack users can turn on auto-update for vulnerable plugins only.