Cross-site scripting (XSS) vulnerability in NTT PC Communications WebARENA Service formmail before 2.2.1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
http://web.arena.ne.jp/support/suite1/manual/cgi_ssi/form.html
http://web.arena.ne.jp/support/news/2016/0208_2.html
http://web.arena.ne.jp/support/news/2016/0208.html