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.
References
| Link | Resource |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2 | Patch Vendor Advisory |
| https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9 | Patch |
| https://github.com/nextcloud/server/issues/51247 | Issue Tracking |
| https://github.com/nextcloud/server/pull/51288 | Issue Tracking |
| https://hackerone.com/reports/3040887 | Permissions Required Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
09 Dec 2025, 16:31
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Nextcloud
Nextcloud nextcloud Server |
|
| References | () https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2 - Patch, Vendor Advisory | |
| References | () https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9 - Patch | |
| References | () https://github.com/nextcloud/server/issues/51247 - Issue Tracking | |
| References | () https://github.com/nextcloud/server/pull/51288 - Issue Tracking | |
| References | () https://hackerone.com/reports/3040887 - Permissions Required, Vendor Advisory | |
| CPE | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
05 Dec 2025, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-12-05 17:16
Updated : 2025-12-09 16:31
NVD link : CVE-2025-66547
Mitre link : CVE-2025-66547
CVE.ORG link : CVE-2025-66547
JSON object : View
Products Affected
nextcloud
- nextcloud_server
CWE
CWE-639
Authorization Bypass Through User-Controlled Key