CVE-2021-41241

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.

• CWE-863
• CWE-862

• 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

Published

Mar 8, 2022

Last Modified

Jun 17, 2026

Status

Modified

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