CVE-2026-28166: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GoodLayers Tourmaster

CVE-2026-28166 is an unauthenticated Cross-Site Scripting (CWE-79) vulnerability affecting GoodLayers Tourmaster versions <=5.4.9. The flaw arises from improper neutralization of input during web page generation, enabling attackers to inject malicious scripts. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No vendor advisory or patch information is available at this time.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected web application without authentication. This may lead to partial disclosure of sensitive information, modification of data, or disruption of service. The overall impact is rated as high severity based on the CVSS score.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying web application firewall (WAF) rules to detect and block XSS attempts and restrict user input where possible.