Launch Services in Apple Mac OS X 10.4.11 and 10.5.1 does not treat HTML files as unsafe content, which allows attackers to conduct cross-site scripting (XSS) attacks or obtain sensitive information via a crafted HTML file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/39102
http://www.vupen.com/english/advisories/2007/4238
http://www.us-cert.gov/cas/techalerts/TA07-352A.html
http://www.securityfocus.com/bid/26910
http://securitytracker.com/id?1019106
http://secunia.com/advisories/28136
http://lists.apple.com/archives/security-announce/2007/Dec/msg00002.html