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CVE-2023-39960— Nextcloud Server has improper restriction of excessive authentication attempts on WebDAV endpoint

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 Server存在安全漏洞，该漏洞源于允许攻击者在WebDAV API上暴力破解密码。受影响的产品和版本：Nextcloud Server 25.09之前版本，26.04之前版本；Nextcloud Enterprise Server 22.2.10.14之前版本，23.0.12.9之前版本，24.0.12.5之前版本，25.0.9之前版本，26.0.4之前版本。

CVSS 5.0 · Medium EPSS 0.57% · P46
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I. Basic Information for CVE-2023-39960

Vulnerability Information
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Vulnerability Title
Nextcloud Server has improper restriction of excessive authentication attempts on WebDAV endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server starting with 25.0.0 and prior to 25.09 and 26.04; as well as Nextcloud Enterprise Server starting with 22.0.0 and prior to 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, and 26.0.4; missing protection allows an attacker to brute force passwords on the WebDAV API. Nextcloud Server 25.0.9 and 26.0.4 and Nextcloud Enterprise Server 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, and 26.0.4 contain patches for this issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 安全漏洞
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 Server存在安全漏洞，该漏洞源于允许攻击者在WebDAV API上暴力破解密码。受影响的产品和版本：Nextcloud Server 25.09之前版本，26.04之前版本；Nextcloud Enterprise Server 22.2.10.14之前版本，23.0.12.9之前版本，24.0.12.5之前版本，25.0.9之前版本，26.0.4之前版本。
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 >= 22.0.0, < 22.2.10.14 -

II. Public POCs for CVE-2023-39960

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III. Intelligence Information for CVE-2023-39960

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Patches & Fixes for CVE-2023-39960 (1)

Vendor Advisories for CVE-2023-39960 (1)

Other References for CVE-2023-39960 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-307

V. Comments for CVE-2023-39960

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