Note by Patchstack

This plugin was still closed for Security Reason as of October 27th 2023. A patch was added in plugin version 3.9.0, but this version isn't available yet. Alternatively, it can be downloaded at https://github.com/webtions/i-recommend-this/releases/tag/3.9.0

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.

Update to version 3.9.0 or later to resolve the vulnerability. Patchstack users can turn on auto-update for vulnerable plugins only.