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.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Nextcloud Server
PublishedDec 5, 2025
First seenDec 5, 2025
How to fix
Update
- nextcloud nextcloud_server31.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud nextcloud_server | 31.0.0 ≤ v < 31.0.1 | 31.0.1 |
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