CVE-2011-3656 in Firefox
Summary
Cross-site scripting (XSS) vulnerability in Mozilla Firefox before 3.6.24 and 4.x through 7 allows remote attackers to inject arbitrary web script or HTML via vectors involving HTTP 0.9 errors, non-default ports, and content-sniffing.
If you want to get best quality of vulnerability data, you may have to visit VulDB.