Mozilla Firefox and Thunderbird before 1.5.0.4 strip the Unicode Byte-order-Mark (BOM) from a UTF-8 page before the page is passed to the parser, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a BOM sequence in the middle of a dangerous tag such as SCRIPT. Fixed in: Firefox 1.5.0.4
Thunderbird 1.5.0.4
SeaMonkey 1.0.2
Publication date: Sat, 03 Jun 2006 00:02:00 +0000