CVE-2023-39962

HighCVSS 7.7/10Last modified Jun 17, 2026

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 19.0.0 and prior to versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a malicious user could delete any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. As a workaround, disable app files_external. This also makes the external storage inaccessible but retains the configurations until a patched version has been deployed.

Metrics

CVSS 3.1 7.7/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weakness enumeration

CWE-284

Affected software

No affected versions have been published.

Timeline

Published: Aug 10, 2023
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2023

CVE-2023-399637.8Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 20.0.0 and prior to versions 20.0.1 CVE-2023-399647.51Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, arbitrary file reads allow an attacker t CVE-2023-399654.31Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, authenticated attackers can download arb CVE-2023-399669.81Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability co CVE-2023-3996710.0WireMock is a tool for mocking HTTP services. When certain request URLs like “@127.0.0.1:1234" are used in WireMock Studio configuration fie CVE-2023-399686.1jupyter-server is the backend for Jupyter web applications. Open Redirect Vulnerability. Maliciously crafted login links to known Jupyter Se CVE-2023-399699.8uthenticode is a small cross-platform library for partially verifying Authenticode digital signatures. Version 1.0.9 of uthenticode hashed t CVE-2023-39977.8Splunk SOAR versions lower than 6.1.0 are indirectly affected by a potential vulnerability accessed through the user’s terminal. A third par CVE-2023-399709.8Unrestricted Upload of File with Dangerous Type vulnerability in AcyMailing component for Joomla. It allows remote code execution.CVE-2023-399716.1Improper Neutralization of Input During Web Page Generation vulnerability in AcyMailing Enterprise component for Joomla allows XSS. This iss CVE-2023-399724.3Improper Access Control vulnerability in AcyMailing Enterprise component for Joomla. It allows unauthorized users to create new mailing list CVE-2023-399734.3Improper Access Control vulnerability in AcyMailing Enterprise component for Joomla. It allows the unauthorized removal of attachments from