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Medium severity · published Jun 1, 2021
CVE-2021-32657
Nextcloud Server is a Nextcloud package that handles data storage
4.3
CVSS
1.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 19.0.11; 20.0.0 before 20.0.10; 21.0.0 before 21.0.2 · source: NVD
Affected product
NS
Nextcloud Server
Nextcloud
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32657
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-32657
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665
Third Party Advisory
https://hackerone.com/reports/1147611
Third Party Advisory
https://security.gentoo.org/glsa/202208-17
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