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Medium 4.3Published Dec 5, 2025
CVE-2025-66547Nextcloud Server is a self hosted personal cloud system.
Updated under an hour ago ()
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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
- 4.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nextcloud nextcloud_server nextcloud:nextcloud_server | from 31.0.0 before 31.0.1; from 31.0.0 before 31.0.1 | NVD |
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2patch, vendor-advisory
- https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9patch
- https://github.com/nextcloud/server/issues/51247issue-tracking
- https://github.com/nextcloud/server/pull/51288issue-tracking
- https://hackerone.com/reports/3040887permissions-required, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.