Auth/Yadis/XML.php in PHP OpenID Library 2.2.2 and earlier allows remote attackers to read arbitrary files, send HTTP requests to intranet servers, or cause a denial of service (CPU and memory consumption) via XRDS data containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue.
http://lists.opensuse.org/opensuse-updates/2016-08/msg00083.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00028.html