Improper Authorization in Nextcloud Server - CVE-2021-41241
Published: March 14, 2022
Vulnerability identifier: #VU61276
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-41241
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authorization check.
The vulnerability exists due to insufficient authorization validation in the groupfolders application. A remote user can gain access to the groupfolder but not specific subfolders.
Affected software
Nextcloud Server
How to mitigate CVE-2021-41241
Install updates from vendor's website.
Nextcloud Server - addressed in versions 20.0.14, 21.0.6, 22.2.1