{"id":"CVE-2021-22915","details":"Nextcloud server before 19.0.11, 20.0.10, 21.0.2 is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting considerations. This could potentially result in an attacker bypassing rate-limit controls such as the Nextcloud brute-force protection.","modified":"2026-04-10T04:30:15.348434Z","published":"2021-06-11T16:15:11.913Z","references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/"},{"type":"ADVISORY","url":"https://nextcloud.com/security/advisory/?id=NC-SA-2021-009"},{"type":"REPORT","url":"https://hackerone.com/reports/1154003"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nextcloud/server","events":[{"introduced":"0"},{"fixed":"ea6649a511ec5963b984342a50103c3637d621a3"},{"introduced":"615b994816710a595243d704c9be445f736b4b41"},{"fixed":"6e537422555592ba6542780533963a67fff68cf1"},{"introduced":"8985b7930653139859002eb3eca2852999ed8f0d"},{"fixed":"59752ce269dfb122ef9e3ae56c33464551aa74e1"},{"introduced":"0"},{"last_affected":"72c37934b777f496bf6b9bc12e5d702423a22d8a"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"19.0.11"},{"introduced":"20.0.0"},{"fixed":"20.0.10"},{"introduced":"21.0.0"},{"fixed":"21.0.2"},{"introduced":"0"},{"last_affected":"33"}]}}],"versions":["v1.0.0beta1","v11.0.0","v11.0RC2","v12.0.0beta1","v12.0.0beta2","v12.0.0beta3","v12.0.0beta4","v13.0.0RC1","v13.0.0beta1","v13.0.0beta2","v13.0.0beta3","v13.0.0beta4","v14.0.0RC1","v14.0.0RC2","v14.0.0beta1","v14.0.0beta2","v14.0.0beta3","v14.0.0beta4","v15.0.0RC1","v15.0.0beta1","v15.0.0beta2","v16.0.0RC1","v16.0.0alpha1","v16.0.0beta1","v16.0.0beta2","v16.0.0beta3","v17.0.0beta1","v17.0.0beta2","v17.0.0beta3","v17.0.0beta4","v18.0.0RC1","v18.0.0beta1","v18.0.0beta2","v18.0.0beta3","v18.0.0beta4","v19.0.0","v19.0.0RC1","v19.0.0RC2","v19.0.0RC3","v19.0.0beta1","v19.0.0beta2","v19.0.0beta3","v19.0.0beta4","v19.0.0beta5","v19.0.0beta6","v19.0.0beta7","v19.0.1","v19.0.10","v19.0.10RC1","v19.0.11RC1","v19.0.1RC1","v19.0.2","v19.0.2RC1","v19.0.2RC2","v19.0.3","v19.0.3RC1","v19.0.4","v19.0.40RC1","v19.0.4RC2","v19.0.5","v19.0.5RC1","v19.0.5RC2","v19.0.6","v19.0.6RC2","v19.0.7","v19.0.7RC1","v19.0.8","v19.0.8RC1","v19.0.9","v19.0.9RC1","v20.0.0","v20.0.0RC1","v20.0.0beta1","v20.0.0beta2","v20.0.0beta3","v20.0.0beta4","v20.0.1","v20.0.10RC1","v20.0.1RC1","v20.0.2","v20.0.2RC1","v20.0.2RC2","v20.0.3","v20.0.3RC2","v20.0.4","v20.0.5","v20.0.5RC1","v20.0.5RC2","v20.0.6","v20.0.6RC1","v20.0.7","v20.0.7RC1","v20.0.8","v20.0.8RC1","v20.0.9","v20.0.9RC1","v21.0.0","v21.0.0beta1","v21.0.0beta2","v21.0.0beta3","v21.0.0beta4","v21.0.0beta5","v21.0.0beta6","v21.0.0beta7","v21.0.0beta8","v21.0.1","v21.0.1RC1","v21.0.2RC1","v22.0.0beta1","v22.0.0beta2","v22.0.0beta4","v22.0.0beta5","v22.0.0rc1","v23.0.0beta1","v23.0.0beta2","v23.0.0beta3","v24.0.0beta1","v24.0.0beta2","v24.0.0beta3","v24.0.0rc1","v25.0.0beta1","v25.0.0beta2","v25.0.0beta3","v25.0.0beta4","v25.0.0beta5","v25.0.0beta6","v25.0.0beta7","v26.0.0beta1","v26.0.0beta2","v26.0.0beta3","v26.0.0beta4","v26.0.0beta5","v26.0.0rc1","v27.0.0beta1","v27.0.0beta2","v28.0.0beta1","v28.0.0beta2","v28.0.0beta3","v28.0.0beta4","v29.0.0beta1","v29.0.0beta2","v29.0.0beta3","v29.0.0beta4","v29.0.0beta5","v29.0.0beta6","v3.0","v30.0.0beta1","v30.0.0beta2","v30.0.0beta3","v30.0.0beta4","v30.0.0beta5","v31.0.0beta1","v31.0.0beta2","v31.0.0beta3","v31.0.0beta4","v31.0.0beta5","v32.0.0beta1","v32.0.0beta2","v32.0.0beta3","v32.0.0beta4","v32.0.0beta5","v33.0.0","v33.0.0beta1","v33.0.0beta2","v33.0.0beta3","v33.0.0beta4","v33.0.0beta5","v33.0.0rc1","v33.0.0rc2","v33.0.0rc3","v33.0.0rc4","v4.0.0","v4.0.0RC","v4.0.0RC2","v4.0.0beta","v4.0.1","v4.0.4","v4.0.5","v4.0.6","v4.5.0","v4.5.0RC1","v4.5.0RC2","v4.5.0RC3","v4.5.0beta3","v4.5.0beta4","v5.0.0","v5.0.0RC1","v5.0.0RC2","v5.0.0RC3","v5.0.0alpha1","v5.0.0beta1","v5.0.0beta2","v6.0.0RC1","v6.0.0RC2","v6.0.0alpha2","v6.0.0beta2","v6.0.0beta3","v6.0.0beta4","v6.0.0beta5","v7.0.0alpha2","v7.0.0beta1","v8.0.0","v8.0.0RC1","v8.0.0RC2","v8.0.0alpha1","v8.0.0alpha2","v8.0.0beta1","v8.0.0beta2","v8.1.0alpha1","v8.1.0alpha2","v8.1.0beta1","v8.1.0beta2","v8.1RC2","v8.2RC1","v8.2beta1","v9.0.0beta2","v9.0beta1","v9.1.0beta1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22915.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"34"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}