Deactivate and delete. No fix is available. The vulnerability was reported to the WordPress plugins team on Jan 19, 2023.
Rio Darmawan discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress Exquisite PayPal Donation Plugin. 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. This vulnerability has not been known to be fixed yet.