Untrusted search path vulnerability in facebook_plugin.fpi in the Facebook plug-in in Foxit Reader 5.3.1.0606 allows local users to gain privileges via a Trojan horse dwmapi.dll file in the current working directory, as demonstrated by a directory that contains a .pdf file. NOTE: some of these details are obtained from third party information.
http://secunia.com/advisories/50348
http://archives.neohapsis.com/archives/fulldisclosure/2012-08/0293.html