NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, an attacker can bruteforce the password reset links. Nextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. No known workarounds are available.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nextcloud_server | Nextcloud | 21.0.0 (including) | 21.0.9.12 (excluding) |
| Nextcloud_server | Nextcloud | 22.0.0 (including) | 22.2.10.12 (excluding) |
| Nextcloud_server | Nextcloud | 23.0.0 (including) | 23.0.12.7 (excluding) |
| Nextcloud_server | Nextcloud | 24.0.0 (including) | 24.0.12.2 (excluding) |
| Nextcloud_server | Nextcloud | 25.0.0 (including) | 25.0.7 (excluding) |
| Nextcloud_server | Nextcloud | 26.0.0 (including) | 26.0.2 (excluding) |
Common protection mechanisms include:
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]