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I. Basic Information for CVE-2025-66554
Vulnerability Information

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Vulnerability Title
Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field
Source: NVD (National Vulnerability Database)
Vulnerability Description
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud 5.5.4之前版本、6.0.6之前版本和7.2.5之前版本存在跨站脚本漏洞,该漏洞源于恶意用户可修改组织和标题字段加载CSS文件,可能导致CSS注入。
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 >= 7.0.0-alpha.1, < 7.2.5 -
II. Public POCs for CVE-2025-66554
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III. Intelligence Information for CVE-2025-66554
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IV. Related Vulnerabilities
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