15th May 2020
Risk level: Low
CVSS v3 Base Score: 4.1 (AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N)
CWE: Improper Access Control - Generic (CWE-284)
HackerOne report: 867052
Improper access control in Nextcloud Deck 1.0.0 allowed an attacker to inject tasks into other users decks.
The error has been fixed.
It is recommended that the Nextcloud Deck is upgraded to 1.0.1.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory: