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I. Basic Information for CVE-2025-66548
Vulnerability Information

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Vulnerability Title
Nextcloud Deck app allows to spoof file extensions by using RTLO characters
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 1.12.7, 1.14.4, and 1.15.1, file extension can be spoofed by using RTLO characters, tricking users into download files with a different extension than what is displayed. This vulnerability is fixed in 1.12.7, 1.14.4, and 1.15.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对输出编码和转义不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Deck 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Deck是Nextcloud开源的一个看板风格的组织工具。旨在为与 Nextcloud 集成的团队进行个人规划和项目组织。 Deck 1.12.7之前版本、1.14.4之前版本和1.15.1之前版本存在安全漏洞,该漏洞源于文件扩展名可被伪造,可能导致用户下载恶意文件。
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, < 1.15.1 -
II. Public POCs for CVE-2025-66548
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III. Intelligence Information for CVE-2025-66548
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IV. Related Vulnerabilities
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