Directory traversal vulnerability exists in a-blog cms Ver.3.1.x series Ver.3.1.9 and earlier, Ver.3.0.x series Ver.3.0.30 and earlier, Ver.2.11.x series Ver.2.11.59 and earlier, Ver.2.10.x series Ver.2.10.51 and earlier, and Ver.2.9 and earlier versions. If this vulnerability is exploited, a user with editor or higher privilege who can login to the product may obtain arbitrary files on the server including password files.