Security researcher Uber0n, has submitted on 29/01/2008 a Frame Redirect vulnerability affecting www.stumbleupon.com, which at the time of submission ranked 346 on the web according to Alexa.
We manually validated and published a mirror of this vulnerability on 15/03/2008. It is currently unfixed.
If you believe that this security issue has been corrected, please send us an e-mail.