CVE-2023-28997

Published: Apr 4, 2023Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 1.2 / Impact: 5.2

Source: NVD

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 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.

Affected (1)

Products: Nextcloud: Desktop

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nextcloud Desktop	From 3.0.0 to 3.6.5

Related CWEs

Reusing a Nonce, Key Pair in Encryption

Nonces should be used for the present occasion and only once.

References (7)

https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf

Source: security-advisories@github.com

ExploitTechnical DescriptionThird Party Advisory

https://github.com/nextcloud/desktop/pull/5324

Source: security-advisories@github.com

Patch

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc

Source: security-advisories@github.com

Vendor Advisory

https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitTechnical DescriptionThird Party Advisory

https://github.com/nextcloud/desktop/pull/5324

Source: af854a3a-2127-422b-91ae-364da2661108

Patch

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.