Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted after a user has been deleted. If a victim reused an earlier used username, the previous user could gain access to their account. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.
| Software | From | Fixed in |
|---|---|---|
| nextcloud / nextcloud_server | 21.0.0 | 21.0.3 |
| nextcloud / nextcloud_server | 20.0.0 | 20.0.11 |
| nextcloud / nextcloud_server | - | 19.0.13 |