Cross-site scripting vulnerability in EC-CUBE Payment Module and GMO-PG Payment Module (PG Multi-Payment Service) for EC-CUBE (EC-CUBE Payment Module (2.12) version 3.5.23 and earlier, EC-CUBE Payment Module (2.11) version 2.3.17 and earlier, GMO-PG Payment Module (PG Multi-Payment Service) (2.12) version 3.5.23 and earlier, and GMO-PG Payment Module (PG Multi-Payment Service) (2.11) version 2.3.17 and earlier) allow an attacker with administrator rights to inject arbitrary web script or HTML via unspecified vectors.