The XSLT implementation in WebKit in Apple Safari before 4.0, iPhone OS 1.0 through 2.2.1, and iPhone OS for iPod touch 1.1 through 2.2.1 does not properly handle redirects, which allows remote attackers to read XML content from arbitrary web pages via a crafted document.
lists.apple.com/archives/security-announce/2009/jun/msg00002.html
lists.apple.com/archives/security-announce/2009/Jun/msg00005.html
lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
osvdb.org/54973
secunia.com/advisories/35379
secunia.com/advisories/43068
support.apple.com/kb/HT3613
support.apple.com/kb/HT3639
www.securityfocus.com/bid/35260
www.vupen.com/english/advisories/2009/1522
www.vupen.com/english/advisories/2009/1621
www.vupen.com/english/advisories/2011/0212