CVE-2025-66547

4.3 MEDIUM
Published: December 05, 2025 Modified: December 09, 2025
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2
Source: security-advisories@github.com
Patch Vendor Advisory
https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9
Source: security-advisories@github.com
Patch
https://github.com/nextcloud/server/issues/51247
Source: security-advisories@github.com
Issue Tracking
https://github.com/nextcloud/server/pull/51288
Source: security-advisories@github.com
Issue Tracking
https://hackerone.com/reports/3040887
Source: security-advisories@github.com
Permissions Required Vendor Advisory

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
4.3 / 10.0
EPSS (Exploit Probability)
0.0%
2th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-639

Affected Vendors

nextcloud

Related CVEs

CVE-2025-52691 10.0
CVE-2025-15168 7.3
CVE-2025-15167 7.3
CVE-2025-15166 7.3
CVE-2025-15165 7.3