Missing permission check on resharing a board (NC-SA-2020-025)
8th April 2020
Risk level: Low
CVSS v3 Base Score: 7.3 (AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H)
HackerOne report: 827816
Improper access control in Nextcloud Deck 0.8.0 allowed an attacker to reshare boards shared with them with more permissions than they had themselves.
- Nextcloud Deck < 0.8.1 (CVE-2020-8182)
The error has been fixed.
It is recommended that the Nextcloud Deck is upgraded to 0.8.1.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:
- Silvia Väli - Clarified Security (firstname.lastname@example.org) - Vulnerability discovery and disclosure.
This advisory is licensed CC BY-SA 4.0.