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.
Advisories

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Fixes

Solution

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Workaround

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History

Fri, 05 Dec 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 05 Dec 2025 16:45:00 +0000

Type Values Removed Values Added
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.
Title Nextcloud Server users can modify tags on files that do not belong to them
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-05T18:20:43.503Z

Reserved: 2025-12-04T15:52:26.550Z

Link: CVE-2025-66547

cve-icon Vulnrichment

Updated: 2025-12-05T18:20:33.143Z

cve-icon NVD

Status : Received

Published: 2025-12-05T17:16:05.330

Modified: 2025-12-05T17:16:05.330

Link: CVE-2025-66547

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses