Multiple cross-site scripting (XSS) vulnerabilities in WordPress before 4.1.2, when MySQL is used without strict mode, allow remote attackers to inject arbitrary web script or HTML via a (1) four-byte UTF-8 character or (2) invalid character that reaches the database layer, as demonstrated by a crafted character in a comment.
https://wpvulndb.com/vulnerabilities/7929
https://wordpress.org/news/2015/04/wordpress-4-1-2/
http://www.securitytracker.com/id/1032207
http://www.securityfocus.com/bid/74269
http://www.debian.org/security/2015/dsa-3250
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158278.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158271.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157391.html