Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as AnonRateThrottle or UserRateThrottle) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. As a workaround, enable a memory cache backend in config.php.
The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nextcloud_server | Nextcloud | * | 20.0.13 (excluding) |
| Nextcloud_server | Nextcloud | 21.0.0 (including) | 21.0.5 (excluding) |
| Nextcloud_server | Nextcloud | 22.0.0 (including) | 22.2.0 (excluding) |