title: Possibility for anyone to add a stack with existing tasks on anyone's board in Nextcloud Deck
description: Nextcloud Deck is a Kanban-style project & personal management tool for Nextcloud. In versions prior to 1.4.8, 1.5.6, and 1.6.1, an authenticated user can move stacks with cards from their own board to a board of another user. The Nextcloud Deck app contains a patch for this issue in versions 1.4.8, 1.5.6, and 1.6.1. There are no known currently-known workarounds available.
problem types: CWE-639: Authorization Bypass Through User-Controlled Key
affected:
{
product: security-advisories
vendor: nextcloud
versions:
status: affected, version: < 1.4.8
status: affected, version: >= 1.5.0, < 1.5.6
status: affected, version: = 1.6.0
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: LOW
privilegesRequired: LOW
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
version: 3.1
]