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I. Basic Information for CVE-2025-66549
Vulnerability Information

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Vulnerability Title
Nextcloud Desktop discloses information when attempting to lock a file inside a end-to-end encrypted directory
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nextcloud Desktop is the desktop sync client for Nextcloud. Prior to 3.16.5, when trying to manually lock a file inside an end-to-end encrypted directory, the path of the file was sent to the server unencrypted, making it possible for administrators to see it in log files. This vulnerability is fixed in 3.16.5.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过错误消息导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud Desktop Client 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud Desktop Client是Nextcloud GmbH的一个开源的文件同步和共享工具。 Nextcloud Desktop Client 3.16.5之前版本存在安全漏洞,该漏洞源于端到端加密目录中文件路径未加密发送,可能导致信息泄露。
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 < 3.16.5 -
II. Public POCs for CVE-2025-66549
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III. Intelligence Information for CVE-2025-66549
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IV. Related Vulnerabilities
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