Microsoft Internet Explorer FTP Credentials Exposure - Advisories - Secunia

Internet ExplorerFTPユーザー名とパスワードが漏洩してしまう脆弱性が存在するそうです。

IEFTPサイトにアクセスした場合ユーザー名とパスワードがHTMLファイルに残されるので、Save-ASをすると漏洩してしまうそうです。

A weakness has been reported in Microsoft Internet Explorer, which may expose FTP usernames and passwords.

When Internet Explorer is used to access an FTP site, the username and password is stored in the file (e.g. an HTML file) when viewing and then saving (using "File" -> "SaveAs") it. This may lead to exposure of the username and password if a user e.g. uploads the saved file or makes it otherwise accessible to other people.

The weakness is reported in Internet Explorer version 6 and 7 (when using the "Open FTP Site in Windows Explorer"). Other versions may also be affected.