{"id":"CVE-2021-21399","aliases":["EUVD-2021-8696","GHSA-p9pm-j95j-5mjf","UBUNTU-CVE-2021-21399"],"status":"published","title":"Unauthenticated SubSonic backend access in Ampache","description":"Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01438,"percentile":0.73504,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284","CWE-287"],"published":"2021-04-13T17:50:13Z","modified":"2026-10-20T10:54:28Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"ampache","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6-rzb2779+dfsg-0ubuntu5","3.6-rzb2779+dfsg-0ubuntu6","3.6-rzb2779+dfsg-0ubuntu7","3.6-rzb2779+dfsg-0ubuntu8","3.6-rzb2779+dfsg-0ubuntu9","3.6-rzb2779+dfsg-0ubuntu9.1","3.6-rzb2779+dfsg-0ubuntu9.2"]}],"products":[{"vendor":"ampache","product":"ampache"}],"references":[{"url":"https://github.com/ampache/ampache/security/advisories/GHSA-p9pm-j95j-5mjf","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Mitigation","Third Party Advisory","evidence","report"]},{"url":"https://ubuntu.com/security/CVE-2021-21399","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-21399","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-21399","title":"Unauthenticated SubSonic backend access in Ampache","description":"Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.","status":"published","published":"2021-04-13T17:50:13Z","modified":"2024-08-03T18:09:15.871Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:33:00.137099Z"}],"euvd":[{"id":"EUVD-2021-8696","description":"Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.","status":"published","published":"2021-04-13T17:50:13Z","modified":"2024-08-03T18:09:15Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T03:25:06.347262Z"}],"nvd":[{"id":"CVE-2021-21399","description":"Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.","status":"published","published":"2021-04-13T20:15:14.843Z","modified":"2026-06-17T03:35:29.393Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-284","CWE-287"],"updated_at":"2026-11-02T14:06:51.610648Z"}],"osv":[{"id":"CVE-2021-21399","description":"Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.","status":"published","published":"2021-04-13T20:15:14.843Z","modified":"2026-10-20T10:54:28.57224643Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:18.004149Z"},{"id":"UBUNTU-CVE-2021-21399","description":"Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.","status":"published","published":"2021-04-13T20:15:00Z","modified":"2025-10-24T04:50:06Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:54:26.29421Z"}]}}