CVE-2021-32657

4.3 mediumEPSS 1.8%

Medium (4.3) 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 of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. This would disallow administrators to administrate users on the Nextcloud instance. The vulnerability is fixed in versions 19.0.11, 20.0.10, and 21.0.2. As a workaround, administrators can use the OCC command line tool to administrate the Nextcloud users.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
CWE: CWE-400
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-fx62-q47f-f665
https://hackerone.com/reports/1147611
https://security.gentoo.org/glsa/202208-17
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665
https://hackerone.com/reports/1147611

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