Group admins can create users with IDs of system folders (NC-SA-2019-015)
12th August 2019
Risk level: Low
CVSS v3 Base Score: 8.4 (AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H)
HackerOne report: 508493
Improper Input Validation in Nextcloud Server 15.0.7 allows group admins to create users with IDs of system folders.
- Nextcloud Server < 15.0.8 (CVE-2019-15624)
- Nextcloud Server < 14.0.11 (CVE-2019-15624)
The error has been fixed.
It is recommended that the Nextcloud Server is upgraded to 15.0.8.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:
- Leon Klingele - Vulnerability discovery and disclosure.
This advisory is licensed CC BY-SA 4.0.