{"id":"CVE-2020-9487","aliases":["BIT-nifi-2020-9487","EUVD-2022-0434","GHSA-3pp3-77j6-8ph6"],"status":"published","title":"Missing Authentication for Critical Function in Apache NiFi","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0305,"percentile":0.87648,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-306"],"published":"2020-10-01T19:53:11Z","modified":"2026-10-24T10:31:03Z","fixes":[{"ecosystem":"Maven","package":"org.apache.nifi:nifi","fixed_in":["1.12.0-RC1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.apache.nifi:nifi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"last_affected":"1.11.4"},{"fixed":"1.12.0-RC1"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"nifi","ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"last_affected":"1.11.4"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.apache.nifi:nifi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.12.0-RC1"}]}],"versions":["1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.10.0","1.11.0","1.11.1","1.11.2","1.11.3","1.11.4","1.2.0","1.3.0","1.4.0","1.5.0","1.6.0","1.7.0","1.7.1","1.8.0","1.9.0","1.9.1","1.9.2"]}],"products":[{"vendor":"apache","product":"nifi"},{"vendor":"apache software foundation","product":"apache nifi"}],"references":[{"url":"https://nifi.apache.org/security#CVE-2020-9487","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9487","tags":["web","advisory"]},{"url":"https://github.com/apache/nifi/commit/01e42dfb3291c3a3549023edadafd2d8023f3042","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3pp3-77j6-8ph6"}],"sources":{"cve":[{"id":"CVE-2020-9487","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2020-10-01T19:53:11Z","modified":"2024-08-04T10:26:16.254Z","updated_at":"2026-11-02T14:35:49.538427Z"}],"euvd":[{"id":"EUVD-2022-0434","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2020-10-01T19:53:11Z","modified":"2024-08-04T10:26:16Z","updated_at":"2026-11-03T03:07:53.493042Z"}],"ghsa":[{"id":"GHSA-3pp3-77j6-8ph6","title":"Missing Authentication for Critical Function in Apache NiFi","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2022-01-06T20:41:04Z","modified":"2023-02-01T05:05:21Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:36:33.613868Z"}],"nvd":[{"id":"CVE-2020-9487","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2020-10-01T20:15:14.253Z","modified":"2026-06-17T03:28:02.383Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:06:17.70091Z"}],"osv":[{"id":"CVE-2020-9487","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2020-10-01T20:15:14.253Z","modified":"2026-10-24T10:31:03.524006946Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:17.663289Z"},{"id":"GHSA-3pp3-77j6-8ph6","title":"Missing Authentication for Critical Function in Apache NiFi","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2022-01-06T20:41:04Z","modified":"2025-09-15T07:41:54.392275Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:46:36.092962Z"},{"id":"BIT-nifi-2020-9487","description":"In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.","status":"published","published":"2025-09-12T11:46:44.344Z","modified":"2026-09-08T08:48:16.978890303Z","updated_at":"2026-11-02T15:28:34.007508Z"}]}}