CVE-2025-66547

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

05/12/2025

Last modified:

09/12/2025

Description

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 31.0.1, non-privileged users can modify tags on files they should not have access to via bulk tagging. This vulnerability is fixed in 31.0.1.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

Base Score 3.x

4.30

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:nextcloud:nextcloud_server:::::-:::*	31.0.0 (including)	31.0.1 (excluding)
cpe:2.3:a:nextcloud:nextcloud_server:::::enterprise:::*	31.0.0 (including)	31.0.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-66547

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools