{"id":"UBUNTU-CVE-2016-2049","details":"examples/consumer/common.php in JanRain PHP OpenID library (aka php-openid) improperly checks the openid.realm parameter against the SERVER_NAME element in the SERVER superglobal array, which might allow remote attackers to hijack the authentication of arbitrary users via vectors involving a crafted HTTP Host header.","modified":"2025-10-24T04:45:37Z","published":"2016-02-01T21:59:00Z","upstream":["CVE-2016-2049"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2049"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2016/01/24/2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-2049"}],"affected":[{"package":{"name":"php-openid","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/php-openid@2.2.2-1.2ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.2-1.2","2.2.2-1.2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"php-openid","binary_version":"2.2.2-1.2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2049.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}