CVE-2023-28998

Nextcloud Desktop client misbehaves with E2EE when the server returns empty list of metadata keys

Published Apr 4, 2023 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-32616 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.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00643}

epss

{'score': 0.00536}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Feb 11, 2025, 3:31 PM
Reserved
Mar 29, 2023, 5:39 PM
Status
Modified
Published
Apr 4, 2023, 1:15 PM
Modified
Jun 17, 2026, 5:49 AM