{"id":"CVE-2021-3663","aliases":["EUVD-2021-1572","GHSA-56cx-wf47-hx7w"],"status":"published","title":"Improper Restriction of Excessive Authentication Attempts in firefly-iii/firefly-iii","description":"firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts","severity":{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0071,"percentile":0.53814,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-307"],"published":"2021-07-25T13:25:12Z","modified":"2026-10-20T10:54:48Z","fixes":[{"ecosystem":"Packagist","package":"grumpydictator/firefly-iii","fixed_in":["5.5.13"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"grumpydictator/firefly-iii","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.13"}]}]},{"source":"osv","ecosystem":"Packagist","package":"grumpydictator/firefly-iii","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.13"}]}],"versions":["3.0.0","3.0.1","3.0.2","3.0.3","3.1","3.1.1","3.1.2","3.1.3","3.1.4","3.1.5","3.1.6","3.10","3.10.1","3.10.2","3.10.3","3.10.4","3.2.0","3.2.1","3.2.2","3.2.3","3.2.4","3.2.5","3.3","3.3.1","3.3.2","3.3.3","3.3.4","3.3.5","3.3.6","3.3.7","3.3.8","3.3.9","3.4","3.4.0.1","3.4.0.10","3.4.0.2","3.4.0.3","3.4.0.4","3.4.0.5","3.4.0.6","3.4.0.7","3.4.0.8","3.4.0.9","3.4.1","3.4.10","3.4.11","3.4.2","3.4.3","3.4.4","3.4.4.1","3.4.4.2","3.4.5","3.4.6","3.4.6.1","3.4.7","3.4.8","3.4.9","3.5.0","3.5.1","3.5.2","3.5.3","3.5.4","3.5.5","3.5.6","3.5.6.1","3.6.0","3.6.1","3.7.0","3.7.1","3.7.2","3.7.2.1","3.7.2.2","3.7.2.3","3.8.0","3.8.1","3.8.2","3.8.3","3.8.4","3.9.0","3.9.1","4.0.0","4.0.1","4.0.2","4.1.0","4.1.1","4.1.2","4.1.3","4.1.4","4.1.5","4.1.6","4.1.7","4.2.0","4.2.1","4.2.2","4.3.0","4.3.1","4.3.2","4.3.3","4.3.4","4.3.5","4.3.6","4.3.7","4.3.8","4.4.0","4.4.1","4.4.2","4.4.3","4.5.0","4.6.0","4.6.1","4.6.10","4.6.11","4.6.11.1","4.6.12","4.6.13","4.6.2","4.6.3","4.6.3.1","4.6.4","4.6.5","4.6.6","4.6.7","4.6.8","4.6.9","4.7.0","4.7.1","4.7.1.1","4.7.1.2","4.7.1.3","4.7.1.4","4.7.10","4.7.11","4.7.12","4.7.12.1","4.7.13","4.7.14","4.7.15","4.7.16","4.7.17","4.7.17.1","4.7.17.2","4.7.17.3","4.7.17.4","4.7.17.5","4.7.17.6","4.7.2","4.7.2.1","4.7.2.2","4.7.3","4.7.3.1","4.7.3.2","4.7.4","4.7.5","4.7.5.1","4.7.5.2","4.7.5.3","4.7.6","4.7.6.1","4.7.6.2","4.7.7","4.7.8","4.7.9","4.8.0","4.8.0.1","4.8.0.2","4.8.0.3","4.8.1","4.8.1.1","4.8.1.2","4.8.1.3","4.8.1.4","4.8.1.5","4.8.1.6","4.8.1.7","4.8.1.8","4.8.2","4.8.2-alpha.1","4.8.2-alpha.2","4.8.2-alpha.3","4.8.2-alpha.4","4.8.2-alpha.5","4.8.2-alpha.6","4.8.2-beta.1","4.8.2-beta.2","4.8.3-alpha.1","5.0.0","5.0.0-alpha.1","5.0.0-alpha.2","5.0.0-beta.1","5.0.1","5.0.2","5.0.3","5.0.4","5.0.5","5.1.0","5.1.0-alpha.1","5.1.0-beta.1","5.1.1","5.2.0","5.2.0-alpha.1","5.2.0-beta.1","5.2.1","5.2.2","5.2.3","5.2.4","5.2.5","5.2.6","5.2.7","5.2.8","5.3.0","5.3.0-alpha.1","5.3.0-beta.1","5.3.0-beta.2","5.3.1","5.3.2","5.3.3","5.4.0","5.4.0-alpha.1","5.4.0-alpha.2","5.4.0-alpha.3","5.4.0-beta.1","5.4.1","5.4.2","5.4.3","5.4.4","5.4.5","5.4.6","5.5.0","5.5.0-beta.1","5.5.0-beta.2","5.5.0-beta.3","5.5.1","5.5.10","5.5.11","5.5.12","5.5.2","5.5.3","5.5.4","5.5.5","5.5.6","5.5.7","5.5.8","5.5.9"]}],"products":[{"vendor":"firefly-iii","product":"firefly-iii/firefly-iii"},{"vendor":"firefly-iii","product":"firefly_iii"}],"references":[{"url":"https://huntr.dev/bounties/497bdf6d-7dba-49c3-8011-1c64dfbb3380","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/firefly-iii/firefly-iii/commit/afc9f4b7ebc8a240c85864a6e1abda62bfeefae8","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3663","tags":["advisory"]},{"url":"https://github.com/firefly-iii/firefly-iii/releases/tag/5.5.13","tags":["web"]},{"url":"https://github.com/advisories/GHSA-56cx-wf47-hx7w"},{"url":"https://github.com/firefly-iii/firefly-iii","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-3663","title":"Improper Restriction of Excessive Authentication Attempts in firefly-iii/firefly-iii","description":"firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts","status":"published","published":"2021-07-25T13:25:12Z","modified":"2024-08-03T17:01:08.317Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-1572","description":"firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts","status":"published","published":"2021-07-25T13:25:12Z","modified":"2024-08-03T17:01:08Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T03:25:11.953192Z"}],"ghsa":[{"id":"GHSA-56cx-wf47-hx7w","title":" No Restriction of Excessive Authentication Attempts in Firefly III","description":"firefly-iii is vulnerable to Improper Lack of Restriction of Excessive Authentication Attempts","status":"published","published":"2021-08-09T20:38:37Z","modified":"2023-07-06T21:34:26Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:36:55.91458Z"}],"nvd":[{"id":"CVE-2021-3663","description":"firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts","status":"published","published":"2021-07-25T14:15:08.317Z","modified":"2026-06-17T04:05:31.753Z","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","assessor":"primary"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:06:56.185362Z"}],"osv":[{"id":"CVE-2021-3663","description":"firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts","status":"published","published":"2021-07-25T14:15:08.317Z","modified":"2026-10-20T10:54:48.274793618Z","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":"2026-11-02T15:44:20.434873Z"},{"id":"GHSA-56cx-wf47-hx7w","title":" No Restriction of Excessive Authentication Attempts in Firefly III","description":"firefly-iii is vulnerable to Improper Lack of Restriction of Excessive Authentication Attempts","status":"published","published":"2021-08-09T20:38:37Z","modified":"2024-02-16T08:15:25.466114Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T15:46:37.864461Z"}]}}