Multiple cross-site scripting (XSS) vulnerabilities in Interchange 5.7 before 5.7.1, 5.6 before 5.6.1, and 5.4 before 5.4.3 allow remote attackers to inject arbitrary web script or HTML via (1) the mv_order_item CGI variable parameter in Core, (2) the country-select widget, or (3) possibly the value specifier when used in the UserTag feature.

Unspecified vulnerability in the 404 error page for the "Standard demo" in Interchange before 5.6.0 and before 5.5.2 has unknown impact and attack vectors.