The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in the ability to bypass authentication via a user-controlled key, allowing attackers to compromise the integrity of protected information.
🗓️ 19 Mar 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 19 Views
| Reporter | Title | Published | Views | Family All 16 |
|---|---|---|---|---|
 | CVE-2025-66547 vulnerabilities | 28 Jan 202613:17 | – | cgr |
 | CVE-2025-66547 | 5 Dec 202514:50 | – | circl |
 | Nextcloud Server 安全漏洞 | 5 Dec 202500:00 | – | cnnvd |
 | CVE-2025-66547 | 5 Dec 202516:32 | – | cve |
 | CVE-2025-66547 Nextcloud Server users can modify tags on files that do not belong to them | 5 Dec 202516:32 | – | cvelist |
 | EUVD-2025-201447 | 5 Dec 202516:32 | – | euvd |
 | Users can modify tags on files that do not belong to them | 5 Dec 202508:00 | – | nextcloud |
 | Nextcloud: Users can modify tags on files that do not belong to them | 16 Mar 202522:23 | – | hackerone |
 | CVE-2025-66547 | 5 Dec 202517:16 | – | nvd |
 | Nextcloud Server 31.0.0 File Tag Modification Vulnerability (GHSA-hq6c-r898-fgf2) | 9 Dec 202500:00 | – | openvas |
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19 Mar 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 24
CVSS 34.3
EPSS0.00273