This could allow a malicious actor to upload any type of file to your website. This can include backdoors which are then executed to gain further access to your website.
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.
Patchstack has issued a mitigation rule to block any attacks until you have updated to a fixed version.
Update to version 6.6.16 or later to remove the vulnerability. Patchstack users can turn on auto-update for vulnerable plugins only.
14 Nov, 2023