This vulnerability is an unauthenticated Cross-Site Scripting (XSS) issue classified under CWE-79 in the Quiz And Survey Master plugin by ExpressTech. Versions up to 11.1.2 are affected. The flaw arises from improper neutralization of input during web page generation, enabling attackers to inject malicious scripts that execute in the context of the victim's browser. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts to confidentiality, integrity, and availability. There is no vendor advisory or patch information available at this time.

Successful exploitation allows unauthenticated attackers to execute arbitrary scripts in users' browsers, potentially leading to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of the affected system.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider applying web application firewall (WAF) rules to detect and block XSS payloads targeting this plugin and limit exposure by restricting access where feasible.