This vulnerability (CVE-2026-66655) affects MultiParcels Shipping For WooCommerce, allowing unauthenticated attackers to perform cross-site scripting (XSS) attacks due to improper input neutralization during web page generation. The affected versions are up to and including 1.30.36, although exact affected versions were not explicitly stated in the input data. 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 impact on confidentiality, integrity, and availability. No vendor advisory or patch information is available, and no known exploits have been reported.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability. The CVSS score of 7.1 indicates a high severity vulnerability with partial impact on confidentiality, integrity, and availability. However, exploitation requires user interaction.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider applying web application firewall (WAF) rules to detect and block XSS payloads targeting this plugin. Monitor for updates from the vendor regarding patches or official mitigations.