Update the WordPress Quiz And Survey Master plugin to the latest available version (at least 7.3.5).
Vlad Vector discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress Quiz And Survey Master 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 been fixed in version 7.3.5.
Unauth. iFrame Injection vulnerability via Paragraph and Short Answer
Improper Input Validation vulnerability
Sensitive Information Disclosure vulnerability
CrossSite Scripting (XSS) vulnerability
Multiple Insecure direct object references (IDOR) vulnerabilities