Unauthenticated Cross Site Scripting (XSS) in CozyStay <= 1.10.0 versions. (CVE-2026-78289)

CVE-2026-78289 is an unauthenticated Cross Site Scripting (XSS) vulnerability in CozyStay affecting all versions up to 1.10.0. The vulnerability allows remote attackers to execute arbitrary scripts in the context of the affected application without requiring authentication. The CVSS 3.1 vector indicates the attack can be performed remotely (AV:N) with low attack complexity (AC:L), no privileges required (PR:N), but requires user interaction (UI:R). The impact affects confidentiality, integrity, and availability (C:L/I:L/A:L). No vendor advisory or patch information is currently available.

Successful exploitation of this vulnerability can lead to execution of arbitrary scripts in users' browsers, potentially allowing theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability. The vulnerability does not require authentication, increasing the risk exposure. However, user interaction is required for exploitation.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, consider applying web application firewalls or input validation controls to mitigate injection of malicious scripts. Monitor vendor channels for official fixes.