Information disclosure in Nextcloud Server - CVE-2021-41239
Published: March 14, 2022
Vulnerability identifier: #VU61277
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-41239
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to User Status API does not consider the user enumeration settings by the administrator. A remote user can gain unauthorized access to sensitive information on the system.
Affected software
Nextcloud Server
How to mitigate CVE-2021-41239
Install updates from vendor's website.
Nextcloud Server - addressed in versions 20.0.14, 21.0.6, 22.2.1