CVE-2021-32654

9.1 criticalEPSS 1.8%

Critical (9.1) in nextcloud nextcloud server. EPSS 1.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-10-31)
CWE: CWE-639
Published: 2021-06-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nextcloud:nextcloud_server

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5
https://hackerone.com/reports/1170024
https://security.gentoo.org/glsa/202208-17
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5
https://hackerone.com/reports/1170024

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