Mozilla Firefox, Thunderbird, and SeaMonkey contain multiple vulnerabilities. These vulnerabilities could allow attackers to execute code remotely, cause a DoS, access sensitive information, and in general control your browsing. The vulnerabilities are in version 2.0.0.11 and prior. Thunderbird 2.0.0.9 and SeaMonkey 1.1.7 are vulnerable to many of the same issues. Mozilla has made upgrade available.