Cross-site scripting (XSS) vulnerability in the management page in Six Apart Movable Type before 5.2 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-5204
http://jvndb.jvn.jp/jvndb/JVNDB-2014-000104