# CVE-2023-28999: nextcloud-desktop: Nextcloud is an open-source productivity platform

CVE-2023-28999 is fixed in nextcloud-desktop on 1 platform, first by DEBIAN-CVE-2023-28999, released April 4, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-28999
- Priority: Routine
- CVSS: 6.4 (medium)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 4, 2023

## Description

Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, 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.​ This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | nextcloud-desktop Debian 13.5 (trixie) | 3.9.0-1 | [DEBIAN-CVE-2023-28999](https://patchblox.com/security/data/fix/linux/debian-cve-2023-28999.md) | Apr 4, 2023 |
| Linux | nextcloud-desktop Debian 14 | 3.9.0-1 | [DEBIAN-CVE-2023-28999](https://patchblox.com/security/data/fix/linux/debian-cve-2023-28999.md) | Apr 4, 2023 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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