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CVE-2021-41239

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. There are no…

Severity
Medium 5.3
Published
8 Mar 2022
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
20.0.14, 21.0.6
Sources
NVD

Affected software

SoftwareAffected versions
NextcloudServers and applications · cpe:a:nextcloud:nextcloud_server
  • Every version before 20.0.14
  • From 21.0.0 before 21.0.6
  • Version 22.2.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-41239
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-41239