CVE-2021-32657

Name: CVE-2021-32657
Creator: NVD / NIST
Published: 2021-06-01T22:15:08.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.82%

Last modified Jun 17, 2026

CVE-2021-32657 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Nextcloud Server is a Nextcloud package that handles data storage. In versions of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. EPSS estimates a 1.82% chance of exploitation in the next 30 days.

Description

Nextcloud Server is a Nextcloud package that handles data storage. In versions of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. This would disallow administrators to administrate users on the Nextcloud instance. The vulnerability is fixed in versions 19.0.11, 20.0.10, and 21.0.2. As a workaround, administrators can use the OCC command line tool to administrate the Nextcloud users.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

1.82%

76.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 19.0.11
Nextcloud	Nextcloud Server	>= 20.0.0, < 20.0.10
Nextcloud	Nextcloud Server	>= 21.0.0, < 21.0.2

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665Third Party Advisory
https://hackerone.com/reports/1147611Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665Third Party Advisory
https://hackerone.com/reports/1147611Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory

Timeline

Published: Jun 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32657?

How severe is CVE-2021-32657?

CVE-2021-32657 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32657?

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-2021-32657?

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

Scan your code now

Source: NVD / NIST