What is the severity of CVE-2021-32800?

CVE-2021-32800 has a severity rating that indicates a medium risk due to its impact on Two Factor Authentication bypass.

How do I fix CVE-2021-32800?

To fix CVE-2021-32800, upgrade your Nextcloud server to a version greater than 20.0.12, 21.0.4, or 22.1.0.

Which versions of Nextcloud are affected by CVE-2021-32800?

CVE-2021-32800 affects Nextcloud versions prior to 20.0.12, 21.0.0 to 21.0.4, and 22.0.0 to 22.1.0.

Can the CVE-2021-32800 vulnerability be exploited without user credentials?

Yes, an attacker can exploit CVE-2021-32800 if they have knowledge of a user's password or access to a WebAuthN trusted device.

Is Two Factor Authentication safe to use with CVE-2021-32800?

Two Factor Authentication is compromised in affected versions due to CVE-2021-32800, making it less secure until updated.

Vulnerability/
CVE-2021-32800

high

8.1

CWE

306

7/9/2021

3/8/2024

CVE-2021-32800: Bypass of Two Factor Authentication in Nextcloud server

First published: Tue Sep 07 2021(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud Server	<20.0.12
Nextcloud Server	>=21.0.0<21.0.4
Nextcloud Server	>=22.0.0<22.1.0

Remedy

https://github.com/nextcloud/server/pull/28078

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-32800?
CVE-2021-32800 has a severity rating that indicates a medium risk due to its impact on Two Factor Authentication bypass.
How do I fix CVE-2021-32800?
To fix CVE-2021-32800, upgrade your Nextcloud server to a version greater than 20.0.12, 21.0.4, or 22.1.0.
Which versions of Nextcloud are affected by CVE-2021-32800?
CVE-2021-32800 affects Nextcloud versions prior to 20.0.12, 21.0.0 to 21.0.4, and 22.0.0 to 22.1.0.
Can the CVE-2021-32800 vulnerability be exploited without user credentials?
Yes, an attacker can exploit CVE-2021-32800 if they have knowledge of a user's password or access to a WebAuthN trusted device.
Is Two Factor Authentication safe to use with CVE-2021-32800?
Two Factor Authentication is compromised in affected versions due to CVE-2021-32800, making it less secure until updated.

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