CVE-2025-66557

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae	Patch
https://github.com/nextcloud/deck/pull/7131	Issue Tracking Patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv	Patch Vendor Advisory
https://hackerone.com/reports/3247499	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nextcloud:deck::::::::
	cpe:2.3:a:nextcloud:deck::::::::

History

09 Dec 2025, 16:46

Type	Values Removed	Values Added
References	~~() https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae -~~	() https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae - Patch
References	~~() https://github.com/nextcloud/deck/pull/7131 -~~	() https://github.com/nextcloud/deck/pull/7131 - Issue Tracking, Patch
References	~~() https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv -~~	() https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv - Patch, Vendor Advisory
References	~~() https://hackerone.com/reports/3247499 -~~	() https://hackerone.com/reports/3247499 - Issue Tracking, Vendor Advisory
First Time		Nextcloud deck Nextcloud
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:a:nextcloud:deck::::::::

05 Dec 2025, 18:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-05 18:15

Updated : 2025-12-09 16:46

NVD link : CVE-2025-66557

Mitre link : CVE-2025-66557

CVE.ORG link : CVE-2025-66557

JSON object : View

Products Affected

nextcloud

deck

CWE

CWE-284

Improper Access Control

NVD-CWE-noinfo

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