[Full-disclosure] Firefox focus stealing vulnerability (possibly other browsers)

[Michal Zalewski]

On Mon, 12 Feb 2007, [ISO-8859-1] Claus Färber wrote:

> A proper solution would be to keep a list of files explicitly selected
> by the user and only allow uploads of files in this list. Then even if a
> script can manipulate the field, the browser won't upload files that
> have not been selected by the user.

Not necessarily that easy: notice that it is the user who enters the name
of a target file.

Unless you want to prevent the browser from accepting any files that were
not chosen using a visual file selector widget - but in such a case,
there's not much point in having a manual file path entry box in the first
place.

/mz