The catalog url replacement in OpenStack Identity (Keystone) before 2013.2.3 and 2014.1 before 2014.1.2.1 allows remote authenticated users to read sensitive configuration options via a crafted endpoint, as demonstrated by "$(admin_token)" in the publicurl endpoint field.
http://www.ubuntu.com/usn/USN-2406-1
http://www.openwall.com/lists/oss-security/2014/09/16/10
http://rhn.redhat.com/errata/RHSA-2014-1790.html