CVE-2021-32726

Webauthn tokens not removed after user has been deleted

Description

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.

Categories

7.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.18%
Vendor Advisory gentoo.org
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6qr9-c846-j8mg third party advisory
https://github.com/nextcloud/server/pull/27532 third party advisory
https://hackerone.com/reports/1202590 permissions required
https://security.gentoo.org/glsa/202208-17 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-32726?
CVE-2021-32726 has been scored as a high severity vulnerability.
How to fix CVE-2021-32726?
To fix CVE-2021-32726, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32726 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32726 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32726?
CVE-2021-32726 affects nextcloud security-advisories.
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