CVE-2017-0884: Nextcloud Server

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a creation of folders in read-only folders despite lacking permissions issue. Due to a logical error in the file caching layer an authenticated adversary is able to create empty folders inside a shared folder. Note that this only affects folders and files that the adversary has at least read-only permissions for.

Affected products

• Nextcloud Nextcloud Server: before 9.0.55 (fixed in 9.0.55); from 10.0.0, before 10.0.2 (fixed in 10.0.2)

Published 2017-04-05. Last modified 2026-06-17.