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CVE-2025-66547

Nextcloud Server users can modify tags on files that do not belong to them

CVSS 4.3 MEDIUMEPSS 0.2%CWE-639
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Productos afectados
nextcloud · security-advisories

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Referencias
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9https://github.com/nextcloud/server/issues/51247https://github.com/nextcloud/server/pull/51288https://hackerone.com/reports/3040887