Cross-site scripting (XSS) vulnerability in the displaySystemError function in html/handle_error.php in LOCKON EC-CUBE 2.11.0 through 2.11.5 allows remote attackers to inject arbitrary web script or HTML by leveraging incorrect handling of error-message output.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-5822
http://www.ec-cube.net/info/weakness/weakness.php?id=54