The getid3 library in MediaWiki before 1.24.1, 1.23.8, 1.22.15 and 1.19.23 allows remote attackers to read arbitrary files, cause a denial of service, or possibly have other impact via an XML External Entity (XXE) attack. NOTE: Related to CVE-2014-2053.
https://security.gentoo.org/glsa/201502-04
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-December/000173.html