CVE-2026-66439 is an unauthenticated cross-site scripting (XSS) vulnerability classified under CWE-79 affecting BeRocket Advanced AJAX Product Filters versions up to 3.2.0.3. The vulnerability arises from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts. 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, scope changed, and impacts on confidentiality, integrity, and availability. No patch or official remediation level has been published as of the report date.

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 data disclosure, modification, or disruption of service. The vulnerability affects confidentiality, integrity, and availability of the application.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider implementing web application firewall (WAF) rules to detect and block malicious input patterns related to this vulnerability. Monitor vendor communications for updates and apply patches promptly once released.