JavaScript execution in mail when forwarding in-line

ID MFSA2006-21
Type mozilla
Reporter Mozilla Foundation
Modified 2006-04-21T00:00:00


Georgi Guninski reports that forwarding mail in-line while using the default HTML "rich mail" editor will execute JavaScript embedded in the e-mail message. Forwarding mail in-line is not the default setting but it is easily accessed through the "Forward As" menu item. This JavaScript runs with the full privileges of the client and could be used to install malware or send spam. In Thunderbird 1.0.7 and below and Mozilla Suite 1.7.12 and below JavaScript is also executed when you reply to a mail, though limited to the sandbox of the message. This script could spy on or alter the message you are composing.