CVE-2021-32800

Name: CVE-2021-32800
Creator: NVD / NIST
Published: 2021-09-07T22:15:08.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.74%

Last modified Jun 17, 2026

CVE-2021-32800 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Nextcloud server is an open source, self hosted personal cloud. In affected versions an attacker is able to bypass Two Factor Authentication in Nextcloud. EPSS estimates a 1.74% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.74%

74.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 20.0.12
Nextcloud	Nextcloud Server	>= 21.0.0, < 21.0.4
Nextcloud	Nextcloud Server	>= 22.0.0, < 22.1.0

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gv5w-8q25-785vThird Party Advisory
https://github.com/nextcloud/server/pull/28078Patch, Third Party Advisory
https://hackerone.com/reports/1271052Permissions Required, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gv5w-8q25-785vThird Party Advisory
https://github.com/nextcloud/server/pull/28078Patch, Third Party Advisory
https://hackerone.com/reports/1271052Permissions Required, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory

Timeline

Published: Sep 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32800?

How severe is CVE-2021-32800?

CVE-2021-32800 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.74% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32800?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32800?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST