CVE-2021-32657 json
Malicious user could break user administration page
published 2021-06-01 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19477
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nextcloud nextcloud_server 19.0.11, 20.0.10, 21.0.2
- nextcloud Arch Linux 21.0.2-1
arch linux advisories AVG-2024
Exploit prediction
1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Affected products
- nextcloud security-advisories
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
security.gentoo.org
/glsa/202208-17
vendor-advisory, third-party-advisory
-
github.com
/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665
third-party-advisory
-
hackerone.com
/reports/1147611
third-party-advisory
Sources
- CVE List CVE-2021-32657
- NVD CVE-2021-32657
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.