Improper Authentication in Nextcloud Server - CVE-2021-32800
Published: September 7, 2021
Vulnerability identifier: #VU56365
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-32800
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in when processing authentication requests. A remote authenticated attacker can bypass Two Factor Authentication and gain access to an account.
Affected software
Nextcloud Server
How to mitigate CVE-2021-32800
Install updates from vendor's website.
Nextcloud Server - addressed in versions 20.0.12, 21.0.4, 22.1.0