This vulnerability (CVE-2026-48867) is an unauthenticated Cross-Site Scripting (XSS) issue in ExpressTech's Quiz And Survey Master plugin, affecting versions up to 11.1.2. The root cause is improper neutralization of input during web page generation (CWE-79), which allows attackers to inject malicious scripts. The CVSS 3.1 base score is 7.1, indicating high severity, with network attack vector, low attack complexity, no privileges required, and user interaction required. The impact scope is changed (S:C), affecting confidentiality, integrity, and availability at a low level. There is no vendor advisory or patch information available at this time.

Successful exploitation of this vulnerability could allow unauthenticated attackers to execute arbitrary scripts in the context of the affected web application, potentially leading to partial disclosure of sensitive information, modification of data, or disruption of service. The CVSS vector indicates low complexity and no privileges required, increasing the risk of exploitation. However, user interaction is required to trigger the attack.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider applying web application firewall (WAF) rules to detect and block XSS payloads targeting this plugin. Avoid exposing the vulnerable plugin to untrusted users where possible.