CVE-2023-28998 MEDIUM

CVE-2023-28998: Nextcloud Desktop client misbehaves with E2EE when the server returns empty list of metadata keys

Vendor Nextcloud
Product security-advisories
Weakness CWE-325
Published April 4, 2023
Last update February 11, 2025
View on NVD All CVEs

CVSS base score

6.7/10
Attack vector Physical
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

Key dates

02Disclosure timeline

April 4, 2023 CVE published
February 11, 2025 Record updated