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Mozilla Foundation Security Advisory 2005-12
Title: javascript: Livefeed bookmarks can steal cookies
Severity: High
Reporter: Omar Khan
Products: Firefox
Fixed in: Firefox 1.0
Description
Earlier versions of Firefox allowed javascript: and
data: URLs as Livefeed bookmarks. When they updated the URL
would be run in the context of the current page and could be used to
steal cookies or data displayed on the page.
If the user were on a page with elevated privileges (for example,
about:config) when the Livefeed was updated,
the feed URL could potentially run arbitrary code on the user's machine.
Workaround
Do not add non-http URLs as a Livefeed bookmark. Upgrade to the fixed version
References
https://bugzilla.mozilla.org/show_bug.cgi?id=265668