{"id":"CVE-2017-1000209","aliases":["GHSA-4hxv-95rc-jqg7"],"url":"https://o3.security/vulnerability/CVE-2017-1000209","summary":"nv-websocket-client allows attackers to spoof SSL/TLS servers via an arbitrary valid certificate","details":"The Java WebSocket client nv-websocket-client does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL/TLS servers via an arbitrary valid certificate.","published":"2017-11-17T02:29:01.097Z","modified":"2026-07-08T11:49:03.801318Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.0066,"percentile":0.49949,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.neovisionaries:nv-websocket-client","fixedVersion":"2.1"}],"fix":{"url":"https://github.com/TakahikoKawasaki/nv-websocket-client/pull/107","label":"TakahikoKawasaki/nv-websocket-client#107"},"references":[{"type":"ADVISORY","url":"https://github.com/TakahikoKawasaki/nv-websocket-client/pull/107"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T11:49:03.801318Z"}}