SeaMonkey is an open source Web browser, advanced email and newsgroup client, IRC chat client, and HTML editor.
Several flaws were found in the processing of some malformed web content. A web page containing such malicious content could cause SeaMonkey to crash or, potentially, execute arbitrary code as the user running SeaMonkey. (CVE-2008-1233, CVE-2008-1235, CVE-2008-1236, CVE-2008-1237)
Several flaws were found in the display of malformed web content. A web page containing specially-crafted content could, potentially, trick a SeaMonkey user into surrendering sensitive information. (CVE-2008-1234, CVE-2008-1238, CVE-2008-1241)
All SeaMonkey users should upgrade to these updated packages, which contain backported patches to resolve these issues.