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.
https://nextcloud.com/security/advisory/?id=NC-SA-2020-025
https://hackerone.com/reports/827816
Source: Mitre, NVD
Published: 2020-10-05
Updated: 2026-06-17
Base Score: 6
Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P
Severity: Medium
Base Score: 8
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.0021