Multiple cross-site scripting (XSS) vulnerabilities in ownCloud 4.5.5, 4.0.10, and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) QUERY_STRING to core/lostpassword/templates/resetpassword.php, (2) mime parameter to apps/files/ajax/mimeicon.php, or (3) token parameter to apps/gallery/sharing.php.