CVE-2025-28935 describes a reflected Cross-site Scripting vulnerability in the puzich Fancybox Plus product, affecting versions up to 1.0.1. The issue stems from improper input neutralization during web page generation, enabling attackers to inject and execute arbitrary scripts in users' browsers. The CVSS 3.1 base score is 7.1, indicating high severity, with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No patch or vendor advisory is currently available to confirm remediation status.

Successful exploitation allows attackers to execute arbitrary scripts in the context of the affected web application, potentially leading to partial compromise of confidentiality, integrity, and availability of user data or application functionality. This can facilitate attacks such as session hijacking, defacement, or denial of service. However, no known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying input validation or output encoding workarounds if feasible, and limit exposure by restricting access to affected versions. Monitor vendor channels for updates regarding patches or official mitigations.