CVE-2021-32653

Name: CVE-2021-32653
Creator: NVD / NIST
Published: 2021-06-01T20:15:08.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.7/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2021-32653 is a low-severity vulnerability rated 2.7/10 on the CVSS scale. Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10, or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10, or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2; no workarounds outside the updates are known to exist.

Metrics

CVSS 3.1

2.7/10

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

EPSS Probability

1.21%

64.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-201

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-396j-vqpr-qg45Third Party Advisory
https://hackerone.com/reports/1173436Permissions Required, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-396j-vqpr-qg45Third Party Advisory
https://hackerone.com/reports/1173436Permissions Required, Third 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-2021-32653?

How severe is CVE-2021-32653?

CVE-2021-32653 has a CVSS score of 2.7/10 (LOW severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32653?

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-2021-32653?

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

Scan your code now

Source: NVD / NIST