app/config/core.php in baserCMS 1.6.15 and earlier does not properly handle installations in shared-hosting environments, which allows remote attackers to hijack sessions by leveraging administrative access to a different domain.
https://exchange.xforce.ibmcloud.com/vulnerabilities/75660
http://www.securityfocus.com/bid/53543
http://jvndb.jvn.jp/jvndb/JVNDB-2012-000043