Vulnerability Monitor

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CVE-2025-66547

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.

Published

2025-12-05T17:16:05.330

Last Modified

2025-12-09T16:31:38.237

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 4.3 (MEDIUM)

Weaknesses

Type: Secondary
CWE-639

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	nextcloud	nextcloud_server	< 31.0.1	Yes
Application	nextcloud	nextcloud_server	< 31.0.1	Yes

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2 Patch, Vendor Advisory ([email protected])
https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9 Patch ([email protected])
https://github.com/nextcloud/server/issues/51247 Issue Tracking ([email protected])
https://github.com/nextcloud/server/pull/51288 Issue Tracking ([email protected])
https://hackerone.com/reports/3040887 Permissions Required, Vendor Advisory ([email protected])