CVE-2026-104391: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ExpressTech Quiz And Survey Master

The vulnerability CVE-2026-104391 in ExpressTech Quiz And Survey Master (quiz-master-next) is a stored cross-site scripting (XSS) flaw caused by improper neutralization of input during web page generation. This allows an attacker with low privileges and requiring user interaction to inject malicious scripts that can affect confidentiality, integrity, and availability of the affected system. The affected versions include all versions prior to 11.2.8. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, low privileges required, user interaction needed, and impact on confidentiality, integrity, and availability.

Successful exploitation of this stored XSS vulnerability can lead to execution of arbitrary scripts in the context of other users, potentially compromising user data confidentiality, integrity, and availability. The attacker requires low privileges and user interaction to exploit this issue. There is no indication of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix information is provided, users should monitor vendor communications for updates. Until a fix is available, consider restricting user input or applying web application firewall (WAF) rules to detect and block malicious input related to this vulnerability.