CVE-2021-32800: Nextcloud Server

High severity, CVSS 8.1. EPSS: 1.8% chance of exploitation in the next 30 days.

Nextcloud server is an open source, self hosted personal cloud. In affected versions an attacker is able to bypass Two Factor Authentication in Nextcloud. Thus knowledge of a password, or access to a WebAuthN trusted device of a user was sufficient to gain access to an account. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. There are no workaround for this vulnerability.

Affected products

• Nextcloud Nextcloud Server: before 20.0.12 (fixed in 20.0.12); from 21.0.0, before 21.0.4 (fixed in 21.0.4); from 22.0.0, before 22.1.0 (fixed in 22.1.0)

Published 2021-09-07. Last modified 2026-06-17.