Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1, a user can access files inside a subfolder of a groupfolder accessible to them, even if advanced permissions would block access to the subfolder. Nextcloud Server versions 25.0.8, 26.0.3, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1 contain a patch for this issue. No known workarounds are available.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nextcloud_server | Nextcloud | 22.0.0 (including) | 22.2.10.13 (excluding) |
| Nextcloud_server | Nextcloud | 23.0.0 (including) | 23.0.12.8 (excluding) |
| Nextcloud_server | Nextcloud | 24.0.0 (including) | 24.0.12.4 (excluding) |
| Nextcloud_server | Nextcloud | 25.0.0 (including) | 25.0.8 (excluding) |
| Nextcloud_server | Nextcloud | 26.0.0 (including) | 26.0.3 (excluding) |
| Nextcloud_server | Nextcloud | 27.0.0 (including) | 27.0.0 (including) |
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: