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CVE-2023-35172— Nextcloud Server password reset endpoint is not brute force protected

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暴力破解密码重置链接。受影响的产品和版本：NxtCloud Server 25.0.0及之前版本，26.0.0及之前版本；NextCloud Enterprise Server 21.0.0及之前版本，22.0.0及之前版本，23.0.0及之前版本，24.0.0及之前版本，25.0.0及之前版本，26.0.0及之前版本。

CVSS 8.7 · High EPSS 0.92% · P59

Possible ATT&CK Techniques 1 AI

T1110.004 · Credential Stuffing
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I. Basic Information for CVE-2023-35172

Vulnerability Information
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Vulnerability Title
Nextcloud Server password reset endpoint is not brute force protected
Source: CVE Program / CVE List V5
Vulnerability Description
NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, an attacker can bruteforce the password reset links. Nextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/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暴力破解密码重置链接。受影响的产品和版本：NxtCloud Server 25.0.0及之前版本，26.0.0及之前版本；NextCloud Enterprise Server 21.0.0及之前版本，22.0.0及之前版本，23.0.0及之前版本，24.0.0及之前版本，25.0.0及之前版本，26.0.0及之前版本。
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 Nextcloud Server >= 25.0.0, < 25.0.7 -

II. Public POCs for CVE-2023-35172

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III. Intelligence Information for CVE-2023-35172

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Patches & Fixes for CVE-2023-35172 (1)

Vendor Advisories for CVE-2023-35172 (1)

Other References for CVE-2023-35172 (1)

Same Patch Batch · nextcloud · 2023-06-23 · 5 CVEs total

CVE-2023-35928 8.5 HIGH Nextcloud user scoped external storage can be used to gather credentials of other users
CVE-2023-35927 7.6 HIGH Nextcloud system addressbooks can be modified by malicious trusted server
CVE-2023-35173 5.7 MEDIUM End-to-End encrypted file-drops can be made inaccessible
CVE-2023-35171 4.1 MEDIUM Nextcloud Server vulnerable to open redirect on "Unsupported browser" warning

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-35172

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