{"id":"UBUNTU-CVE-2025-37731","details":"Improper Authentication in Elasticsearch PKI realm can lead to user impersonation via specially crafted client certificates. A malicious actor would need to have such a crafted client certificate signed by a legitimate, trusted Certificate Authority.","modified":"2025-12-19T18:06:50.920082Z","published":"2025-12-15T11:15:00Z","upstream":["CVE-2025-37731"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-37731"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-37731"},{"type":"REPORT","url":"https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-and-9-2-2-security-update-esa-2025-27/384063"}],"affected":[{"package":{"name":"elasticsearch","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/elasticsearch@1.7.3+dfsg-3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.2+dfsg-1","1.7.3+dfsg-1","1.7.3+dfsg-2","1.7.3+dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_name":"elasticsearch","binary_version":"1.7.3+dfsg-3"},{"binary_name":"libelasticsearch1.7-java","binary_version":"1.7.3+dfsg-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-37731.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}