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I. Basic Information for CVE-2025-66557
Vulnerability Information

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Vulnerability Title
Nextcloud Deck app allowed user with "Can share" permission to modify permissions of other non-owners
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.
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:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud Desktop Client 访问控制错误漏洞
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 1.14.6之前版本和1.15.2之前版本存在访问控制错误漏洞,该漏洞源于权限逻辑错误,可能导致共享权限被滥用。
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 >= 1.15.0-beta.1, < 1.15.2 -
II. Public POCs for CVE-2025-66557
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III. Intelligence Information for CVE-2025-66557
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