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.
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
| Link | Tags |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m4wp-r357-4q94 | issue tracking third party advisory |
| https://github.com/nextcloud/groupfolders/issues/1692 | issue tracking third party advisory patch |
| https://github.com/nextcloud/server/pull/29362 | third party advisory patch |
| https://security.gentoo.org/glsa/202208-17 | third party advisory vendor advisory |