UpHeron
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Servers and applications

CVE-2021-32726

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted after a user has been deleted. If a victim reused an earlier used username, the previous user could gain access to their account. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

Severity
Critical 9.8
Published
12 Jul 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
19.0.13, 20.0.11, 21.0.3
Sources
NVD

Affected software

SoftwareAffected versions
NextcloudServers and applications · cpe:a:nextcloud:nextcloud_server
  • Every version before 19.0.13
  • From 20.0.0 before 20.0.11
  • From 21.0.0 before 21.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-32726
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-32726