Vulnerability DatabaseCVE-2023-28997
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CVE-2023-28997
April 04, 2023
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 recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.
Related Resources (5)
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
https://github.com/nextcloud/desktop/pull/5324
https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc
https://security-tracker.debian.org/tracker/CVE-2023-28997
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CVSS v4
Base Score:
8.4
Attack Vector
PHYSICAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.7
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Reusing a Nonce, Key Pair in Encryption
CWE-323
EPSS
Base Score:
0.61