CVE-2025-66547

medium

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.

References

https://hackerone.com/reports/3040887

https://github.com/nextcloud/server/pull/51288

https://github.com/nextcloud/server/issues/51247

https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2

Details

Source: Mitre, NVD

Published: 2025-12-05

Updated: 2025-12-05

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 4.3

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