---
id: CVE-2025-66557
title: >-
  Nextcloud Deck is a kanban style organization tool aimed at personal planning
  and project organization for teams integrated with Nextcloud
summary: >-
  Nextcloud Deck is a kanban style organization tool aimed at personal planning
  and project organization for teams integrated with Nextcloud. Prior to 1.14.6
  and 1.15.2, a bug in the permission logic allowed users with "Can share"
  permissi…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-284
vendor: nextcloud
product: deck
affected:
  - 'deck >= 1.14.0, < 1.14.6'
  - 'deck >= 1.15.0, < 1.15.2'
patched:
  - deck 1.15.2
published: '2025-12-05'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T23:10:00.463'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66557'
references:
  - url: >-
      https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae
    label: security-advisories@github.com
  - url: 'https://github.com/nextcloud/deck/pull/7131'
    label: security-advisories@github.com
  - url: >-
      https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv
    label: security-advisories@github.com
  - url: 'https://hackerone.com/reports/3247499'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00279
epssPercentile: 0.1815
ingestedAt: '2026-09-25T23:21:16.897Z'
---

## Overview

Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.

## Affected

- `deck >= 1.14.0, < 1.14.6`
- `deck >= 1.15.0, < 1.15.2`

## Remediation

Upgrade past the affected range:

- `deck 1.15.2`