source: https://www.securityfocus.com/bid/35829/info Apple Safari is affected by a URI-spoofing vulnerability. An attacker may leverage this issue by inserting arbitrary content to spoof a URI presented to an unsuspecting user. This may lead to a false sense of trust because the victim may be presented with a URI of a seemingly trusted site while interacting with the attacker's malicious site. Safari 4.0.1 is affected; other versions may also be vulnerable. This issue is similar to the vulnerability discussed in BID 35803 (Mozilla Firefox Error Page Address Bar URI Spoofing Vulnerability).
Juan Pablo Lopez Yacubian