CVE-2021-41241
The groupfolders application for Nextcloud allows sharing a folder with a group of people.
Does this matter?
Lower severity and a low EPSS score (0.85%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.85% probability · 56th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863, CWE-862
- Affected
- nextcloud/nextcloud server
- Source
- security-advisories@github.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.