Critical
Security advisory
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-32654
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:07 UTC · Revision 1
Source evidence
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.
osv:CVE-2021-32654
Complete source record
{
"id": "98699be954eda701959719838fcc048750746848a8b7d97e2c45216d8e4b4e9a",
"url": "https://osv.dev/vulnerability/CVE-2021-32654",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-32654",
"summary": "Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.",
"evidence": "osv:CVE-2021-32654",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-32654",
"aliases": [
"CVE-2021-32654",
"GHSA-jf9h-v24c-22g5"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/nextcloud/server",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "ea6649a511ec5963b984342a50103c3637d621a3"
},
{
"introduced": "615b994816710a595243d704c9be445f736b4b41"
},
{
"fixed": "6e537422555592ba6542780533963a67fff68cf1"
},
{
"introduced": "8985b7930653139859002eb3eca2852999ed8f0d"
},
{
"fixed": "59752ce269dfb122ef9e3ae56c33464551aa74e1"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "19.0.11"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "20.0.0"
},
{
"fixed": "20.0.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "21.0.0"
},
{
"fixed": "21.0.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v19.0.11RC1",
"v20.0.10RC1",
"v21.0.2RC1",
"v19.0.10",
"v20.0.9",
"v21.0.1",
"v19.0.10RC1",
"v21.0.1RC1",
"v20.0.9RC1",
"v19.0.9",
"v20.0.8",
"v21.0.0",
"v19.0.9RC1",
"v20.0.8RC1",
"v20.0.7RC1",
"v20.0.7",
"v19.0.8",
"v20.0.6",
"v19.0.8RC1",
"v20.0.6RC1",
"v19.0.7",
"v20.0.5",
"v20.0.5RC2",
"v19.0.7RC1",
"v20.0.5RC1",
"v20.0.4",
"v19.0.6",
"v20.0.3",
"v19.0.6RC2",
"v20.0.3RC2",
"v19.0.5",
"v20.0.2",
"v19.0.5RC2",
"v20.0.2RC2",
"v19.0.5RC1",
"v20.0.2RC1",
"v20.0.1",
"v20.0.1RC1",
"v19.0.4",
"v19.0.4RC2",
"v20.0.0",
"v19.0.40RC1",
"v19.0.3",
"v19.0.3RC1",
"v19.0.2",
"v19.0.2RC2",
"v19.0.2RC1",
"v19.0.1",
"v19.0.1RC1",
"v19.0.0",
"v19.0.0RC3",
"v19.0.0RC1",
"v19.0.0beta7",
"v19.0.0beta6",
"v19.0.0beta5",
"v19.0.0beta4",
"v19.0.0beta3",
"v19.0.0beta2",
"v19.0.0beta1",
"v18.0.0RC1",
"v18.0.0beta4",
"v18.0.0beta3",
"v18.0.0beta2",
"v18.0.0beta1",
"v17.0.0beta4",
"v17.0.0beta3",
"v17.0.0beta2",
"v17.0.0beta1",
"v16.0.0RC1",
"v16.0.0beta3",
"v16.0.0beta2",
"v16.0.0beta1",
"v16.0.0alpha1",
"v15.0.0RC1",
"v15.0.0beta2",
"v15.0.0beta1",
"v14.0.0RC2",
"v14.0.0RC1",
"v14.0.0beta4",
"v14.0.0beta3",
"v14.0.0beta2",
"v14.0.0beta1",
"v13.0.0RC1",
"v13.0.0beta4",
"v13.0.0beta3",
"v13.0.0beta2",
"v13.0.0beta1",
"v12.0.0beta4",
"v12.0.0beta3",
"v12.0.0beta2",
"v12.0.0beta1",
"v11.0.0",
"v11.0RC2",
"v9.1.0beta1",
"v9.0.0beta2",
"v9.0beta1",
"v8.2RC1",
"v8.2beta1",
"v8.1RC2",
"v8.1.0beta2",
"v8.1.0beta1",
"v8.1.0alpha2",
"v8.1.0alpha1",
"v8.0.0",
"v8.0.0RC2",
"v8.0.0RC1",
"v8.0.0beta2",
"v8.0.0beta1",
"v8.0.0alpha2",
"v8.0.0alpha1",
"v7.0.0beta1",
"v7.0.0alpha2",
"v6.0.0RC2",
"v6.0.0RC1",
"v6.0.0beta5",
"v6.0.0beta4",
"v6.0.0beta3",
"v6.0.0beta2",
"v6.0.0alpha2",
"v5.0.0",
"v5.0.0RC3",
"v5.0.0RC2",
"v5.0.0RC1",
"v5.0.0beta2",
"v5.0.0beta1",
"v5.0.0alpha1",
"v4.5.0",
"v4.5.0RC3",
"v4.5.0RC2",
"v4.5.0RC1",
"v4.5.0beta4",
"v4.5.0beta3",
"v4.0.6",
"v4.0.5",
"v4.0.4",
"v4.0.1",
"v4.0.0",
"v4.0.0RC2",
"v4.0.0RC",
"v4.0.0beta",
"v3.0",
"v1.0.0beta1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32654.json"
}
}
],
"modified": "2026-10-24T10:30:48.965701045Z",
"provider": "osv",
"references": [
"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5",
"https://security.gentoo.org/glsa/202208-17",
"https://hackerone.com/reports/1170024"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-32654",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 436896,
"published_at": "2021-06-01T21:15:07.68+00:00"
}