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High severity · published Sep 7, 2021
CVE-2021-32800
Nextcloud server is an open source, self hosted personal cloud
8.1
CVSS
1.8%
EPSS
No
On KEV
Description
Nextcloud server is an open source, self hosted personal cloud. In affected versions an attacker is able to bypass Two Factor Authentication in Nextcloud. Thus knowledge of a password, or access to a WebAuthN trusted device of a user was sufficient to gain access to an account. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. There are no workaround for this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 20.0.12; 21.0.0 before 21.0.4; 22.0.0 before 22.1.0 · source: NVD
Affected product
NS
Nextcloud Server
Nextcloud
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32800
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-32800
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gv5w-8q25-785v
Patch
https://github.com/nextcloud/server/pull/28078
Permissions Required
https://hackerone.com/reports/1271052
Third Party Advisory
https://security.gentoo.org/glsa/202208-17
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