Directory traversal vulnerability in io/filesystem/filesystem.cc in Widelands before 15.1 might allow remote attackers to overwrite arbitrary files via . (dot) characters in a pathname that is used for a file transfer in an Internet game.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=617960
http://bazaar.launchpad.net/~widelands-dev/widelands/build-15/revision/5021