This vulnerability (CVE-2026-66707) is classified as CWE-79, indicating improper neutralization of input during web page generation, resulting in Cross-Site Scripting (XSS). It affects Facebook for WooCommerce versions up to 3.7.5. The flaw allows unauthenticated attackers to inject malicious scripts, potentially impacting confidentiality, integrity, and availability of the affected system. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and scope change with low confidentiality, integrity, and availability impacts. No known exploits in the wild or vendor patches have been reported as of the publication date.

Successful exploitation could allow an unauthenticated attacker to execute arbitrary scripts in the context of the affected application, potentially leading to partial disclosure of information, modification of data, or disruption of service. The CVSS vector indicates a low complexity attack that requires user interaction but no privileges, with a scope change and low impact on confidentiality, integrity, and availability.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, users should monitor vendor communications for updates. Until a patch is available, consider applying web application firewall (WAF) rules to detect and block XSS attempts specific to this vulnerability if feasible.