Incomplete blacklist vulnerability in Ideal Science Ideal BB 1.5.4a and earlier allows remote attackers to upload and execute an ASP script via a ".asa" file, which bypasses the check for the ".asp" extension but is executable on the server.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26353
http://www.vupen.com/english/advisories/2006/1729
http://www.securityfocus.com/archive/1/433248/100/0/threaded
http://www.idealscience.com/ibb/posts.aspx?postID=24415
http://securityreason.com/securityalert/871
http://secunia.com/advisories/20035
http://lists.grok.org.uk/pipermail/full-disclosure/2006-May/045887.html