Netscape Navigator 7.0.2 and Mozilla allows remote attackers to access cookie information in a different domain via an HTTP request for a domain with an extra . (dot) at the end.
The XMLHttpRequest object (XMLHTTP) in Netscape 6.1 and Mozilla 0.9.7 allows remote attackers to read arbitrary files and list directories on a client system by opening a URL that redirects the browser to the file on the client, then reading the result using the responseText property.