Improper access control in Nextcloud Server - CVE-2021-22877
Published: March 1, 2021
Vulnerability identifier: #VU51013
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-22877
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote administrator can populate own credentials for other users external storage configuration when they did not configure one yet.
Affected software
Nextcloud Server
How to mitigate CVE-2021-22877
Install updates from vendor's website.
Nextcloud Server - update to 20.0.6