{"cve":"CVE-2020-9487","nvd":{"published":"2020-10-01T20:15:14.253","modified":"2026-06-17T03:28:02.383","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-306"],"references":["https://nifi.apache.org/security#CVE-2020-9487","https://nifi.apache.org/security#CVE-2020-9487"],"products":["apache:nifi"],"source":"nvd","synced_at":"2026-10-19T21:09:53.489947993+00:00"},"epss":{"cve":"CVE-2020-9487","score":0.0305,"percentile":0.87563,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3pp3-77j6-8ph6","url":"https://osv.dev/vulnerability/GHSA-3pp3-77j6-8ph6","summary":"Missing Authentication for Critical Function in Apache NiFi","modified":"2025-09-15T07:41:54.392275Z","packages":[{"ecosystem":"Maven","name":"org.apache.nifi:nifi","purl":"pkg:maven/org.apache.nifi/nifi","ranges":[">=1.0.0 <1.12.0-RC1"],"fixed":["1.12.0-RC1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}