Update the WordPress Quiz And Survey Master plugin to the latest available version (at least 7.3.11).
MgThuraMoeMyint discovered and reported this Sensitive Data Exposure vulnerability in WordPress Quiz And Survey Master Plugin. This vulnerability has been fixed in version 7.3.11.
Unauth. iFrame Injection vulnerability via Paragraph and Short Answer
Improper Input Validation vulnerability
CrossSite Scripting (XSS) vulnerability
Multiple Insecure direct object references (IDOR) vulnerabilities