CVE-2023-28998
Publication date 4 April 2023
Last updated 26 August 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| nextcloud-desktop | 26.04 LTS resolute |
Not affected
|
| 25.10 questing |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal | Ignored end of standard support, was needs-triage | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Ignored end of standard support | |
| 14.04 LTS trusty | Ignored end of standard support |
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.7 · Medium
Vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
References
Other references
- https://github.com/nextcloud/desktop/pull/5323
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
- https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
- https://www.cve.org/CVERecord?id=CVE-2023-28998