CVE-2026-78289: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in LoftOcean CozyStay

CVE-2026-78289 describes an unauthenticated cross-site scripting (XSS) vulnerability in LoftOcean CozyStay software versions up to 1.10.0. The vulnerability is due to improper neutralization of input during web page generation, allowing 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, scope changed, and low impacts on confidentiality, integrity, and availability. There is no vendor advisory or patch information available at this time.

Successful exploitation of this vulnerability could allow an unauthenticated attacker 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 application availability. The CVSS score indicates a high severity with limited but meaningful impact on confidentiality, integrity, and availability.

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