CVE-2021-41241

Name: CVE-2021-41241
Creator: NVD / NIST
Published: 2022-03-08T19:15:07.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2021-41241 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Nextcloud server is a self hosted system designed to provide cloud style services. The groupfolders application for Nextcloud allows sharing a folder with a group of people. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

Nextcloud server is a self hosted system designed to provide cloud style services. The groupfolders application for Nextcloud allows sharing a folder with a group of people. In addition, it allows setting "advanced permissions" on subfolders, for example, a user could be granted access to the groupfolder but not specific subfolders. Due to a lacking permission check in affected versions, a user could still access these subfolders by copying the groupfolder to another location. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. Users unable to upgrade should disable the "groupfolders" application in the admin settings.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.82%

52.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 20.0.14
Nextcloud	Nextcloud Server	>= 21.0.0, < 21.0.6
Nextcloud	Nextcloud Server	22.2.0

References

https://github.com/nextcloud/groupfolders/issues/1692Issue Tracking, Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m4wp-r357-4q94Issue Tracking, Third Party Advisory
https://github.com/nextcloud/server/pull/29362Patch, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory
https://github.com/nextcloud/groupfolders/issues/1692Issue Tracking, Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m4wp-r357-4q94Issue Tracking, Third Party Advisory
https://github.com/nextcloud/server/pull/29362Patch, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory

Timeline

Published: Mar 8, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41241?

How severe is CVE-2021-41241?

CVE-2021-41241 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41241?

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-2021-41241?

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

Scan your code now

Source: NVD / NIST