This vulnerability (CVE-2026-57356) is an unauthenticated Cross-Site Scripting (XSS) issue in the MC Woocommerce Wishlist plugin, specifically in versions up to 1.9.19. It stems from improper neutralization of input during web page generation (CWE-79), allowing attackers to inject malicious scripts that execute in the context of 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 with scope changed. No patch or official remediation has been published as of the data provided.

Successful exploitation of this vulnerability could allow unauthenticated attackers to execute arbitrary scripts in the context of users visiting affected sites. This can lead to partial compromise of confidentiality (e.g., theft of sensitive information), integrity (e.g., manipulation of displayed content), and availability (e.g., disruption of service). The scope of impact extends beyond the vulnerable component due to the changed scope in CVSS.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider applying temporary mitigations such as input validation or output encoding at the application level if feasible. Monitor vendor channels for updates and apply patches promptly once available.