The displaySystemError function in html/handle_error.php in LOCKON EC-CUBE 2.11.0 through 2.11.5 allows remote attackers to obtain sensitive information by leveraging incorrect handling of error-log output.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-5821
http://www.ec-cube.net/info/weakness/weakness.php?id=54