"A 7-year-old flaw that could let an attacker place malicious content on trusted Web sites has resurfaced in the most recent Firefox browser, Secunia has warned."I couldn't reproduce the flaw on my machine because I have set a tab-browsing option on my machine for Firefox. This setting doesn't allow clicking a link to open a new window unless I specifically right click on the link and choose "Open Link in New Window". The preference can be turned on like so: Tools->Options->Tabs->Force links that open new windows to open in->a new tab.
This doesn't take away from the fact that this flaw should be fixed and the Mozilla source should be scrubbed for more flaws like this one.