Multiple cross-site scripting (XSS) vulnerabilities in wp-includes/class-wp-theme.php in WordPress before 4.4.1 allow remote attackers to inject arbitrary web script or HTML via a (1) stylesheet name or (2) template name to wp-admin/customize.php.
https://wpvulndb.com/vulnerabilities/8358
https://wordpress.org/news/2016/01/wordpress-4-4-1-security-and-maintenance-release/
https://core.trac.wordpress.org/changeset/36185
https://codex.wordpress.org/Version_4.4.1
http://www.securitytracker.com/id/1034622