The ioQuake3 engine as used in World of Padman 1.2 and earlier Tremulous 1.1.0 and ioUrbanTerror 2007-12-20 does not check for dangerous file extensions before writing to the quake3 directory which allows remote attackers to execute arbitrary code via a crafted third-party addon that creates a Trojan horse DLL file a different vulnerability than CVE-2011-2764.