3rd June 2020
Risk level: Low
CVSS v3 Base Score: 5.1 (AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L)
CWE: Insecure Direct Object Reference (IDOR) (CWE-639)
HackerOne report: 882258
A logic error in Nextcloud Deck 1.0.1 allowed new users with a duplicate user identifier to use deck data of a previous deleted user.
The error has been fixed.
It is recommended that the Nextcloud Deck is upgraded to 1.0.2.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory: