CVE-2021-41241
low-risk
Published 2022-03-08
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.
Do I need to act?
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0.23% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10
Medium
NETWORK
/ LOW complexity
Affected Products (2)
Affected Vendors
References (8)
Issue Tracking
https://github.com/nextcloud/groupfolders/issues/1692
Third Party Advisory
https://security.gentoo.org/glsa/202208-17
Issue Tracking
https://github.com/nextcloud/groupfolders/issues/1692
Third Party Advisory
https://security.gentoo.org/glsa/202208-17
26
/ 100
low-risk
Severity
18/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
7/34 · Low