Main Vulnerability Database Vulnerabilities #VU83360

Improper access control in Nextcloud Enterprise Server and Nextcloud Server - CVE-2023-48239

Published: November 21, 2023

Vulnerability identifier: #VU83360

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-48239

CWE-ID: CWE-284

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user can update any personal or global external storage and make them inaccessible for everyone else as well.

Affected software

Nextcloud Enterprise Server
Nextcloud Server

How to mitigate CVE-2023-48239

Install updates from vendor's website.

Nextcloud Enterprise Server - addressed in versions 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, 27.1.3
Nextcloud Server - addressed in versions 25.0.13, 26.0.8, 27.1.3

External References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hw26-g267

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