The (1) filesystem::get_wml_location function in filesystem.cpp and (2) is_legal_file function in filesystem_boost.cpp in Battle for Wesnoth before 1.12.3 and 1.13.x before 1.13.1 allow remote attackers to obtain sensitive information via vectors related to inclusion of .pbl files from WML.
https://github.com/wesnoth/wesnoth/releases/tag/1.13.1
https://github.com/wesnoth/wesnoth/releases/tag/1.12.3
https://github.com/wesnoth/wesnoth/commit/f8914468182e8d0a1551b430c0879ba236fe4d6d
https://bugzilla.redhat.com/show_bug.cgi?id=1236010
http://www.securityfocus.com/bid/75424
http://www.openwall.com/lists/oss-security/2015/06/25/12
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161752.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161722.html