26th July 2019
Risk level: Low
CVSS v3 Base Score: 3.2 (AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
CWE: Authentication Bypass Using an Alternate Path or Channel (CWE-288)
HackerOne report: 331489
If an attacker has physical access to an Android smartphone without a screen lock, but with nextcloud installed and set up, they can easily access the nextcloud-files even if the nextcloud app is locked with a fingerprint or pin.
The error has been fixed.
It is recommended that users upgrade to version 3.3.0 or later.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory: