Published:2009/06/24 Last Updated:2009/06/24
Information from Six Apart KK
Vulnerability ID:JVN#86472161
Title:Movable Type cross-site scripting vulnerability
Status:Vulnerable
This is a statement from the vendor itself with no modification by JPCERT/CC.
Please see the page below for the detail and to download the fixed version
http://www.movabletype.org/2009/06/mt_4261_a_small_patch_release.html