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I. Basic Information for CVE-2025-66547
Vulnerability Information
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Vulnerability Title
Nextcloud Server users can modify tags on files that do not belong to them
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud Server是Nextcloud开源的一个Nextcloud服务器程序。 Nextcloud Server 31.0.1之前版本存在安全漏洞，该漏洞源于非特权用户可通过批量标记修改文件标签，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
nextcloudsecurity-advisories < 31.0.1 -
II. Public POCs for CVE-2025-66547
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III. Intelligence Information for CVE-2025-66547
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IV. Related Vulnerabilities
Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-639
V. Comments for CVE-2025-66547

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