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CVE-2025-47794— Nextcloud Server vulnerable to insecure temporary file creation, race with write access and permission

Quick assessment

Affected
nextcloud security-advisories
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 29.0.13之前版本、30.0.7之前版本和31.0.1之前版本存在访问控制错误漏洞，该漏洞源于攻击者可读取临时文件或运行符号链接攻击。

CVSS 2.6 · Low EPSS 0.47% · P39
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I. Basic Information for CVE-2025-47794

Vulnerability Information
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Vulnerability Title
Nextcloud Server vulnerable to insecure temporary file creation, race with write access and permission
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 29.0.13, 30.0.7, and 31.0.1 and Nextcloud Enterprise Server prior to 26.0.13.13, 27.1.11.13, 28.0.14.4, 29.0.13, 30.0.7, and 31.0.1, an attacker on a multi-user system may read temporary files from Nextcloud running with a different user account, or run a symlink attack. Nextcloud Server versions 29.0.13, 30.0.7, and 31.0.1 and Nextcloud Enterprise Server 26.0.13.13, 27.1.11.13, 28.0.14.4, 29.0.13, 30.0.7, and 31.0.1 fix the issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 访问控制错误漏洞
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 29.0.13之前版本、30.0.7之前版本和31.0.1之前版本存在访问控制错误漏洞，该漏洞源于攻击者可读取临时文件或运行符号链接攻击。
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

Vendor Product Affected Versions CPE Subscribe
nextcloud security-advisories >= 26.0.0, < 26.0.13.13 -

II. Public POCs for CVE-2025-47794

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III. Intelligence Information for CVE-2025-47794

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Vendor Advisories for CVE-2025-47794 (1)

Same Patch Batch · nextcloud · 2025-05-16 · 5 CVEs total

CVE-2025-47790 6.4 MEDIUM Nextcloud Server doesn't request second factor after session timeout
CVE-2025-47792 5.0 MEDIUM Nextcloud Desktop 3rdparty applications can create share links via socket API
CVE-2025-47793 4.3 MEDIUM Nextcloud Server and Groupfolders app vulnerable to bypass of group folder quota limit usi
CVE-2025-47791 4.3 MEDIUM Nextcloud Server's test remote endpoint is not rate limited

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-284

V. Comments for CVE-2025-47794

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