Vulnerability Report

CVE-2023-28997

Title: Nextcloud Desktop

Other

Proof Of Concept

No public PoC currently indexed for CVE-2023-28997.

CWE Category CWE-323
Published Date Apr 04, 2023
Modified Date Nov 03, 2025
Exploit Status Not Found
Score 6.7 CVSS v3.1
Exploit Probability (EPSS)
1.11%

Vulnerability Summary

CVE-2023-28997: 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.

Impacted Vendors

A
avira 1
G
google 1
N
nextcloud 1

Reference Links

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://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc 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://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.7
Attack Vector
PHYSICAL
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-28997 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector PHYSICAL
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

Affected Stack

No specific products linked.