🛡️ CVE-2023-29000 — desktop

🟡 CVSS 5.4 — Medium ✅ No Known Exploit CWE-295 NVD

5.4

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.7.0, by trusting that the server will return a certificate that belongs to the keypair of the user, a malicious server could get the desktop client to encrypt files with a key known to the attacker. This issue is fixed in Nextcloud Desktop 3.7.0. No known workarounds are available.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2023-29000 is classified as CWE-295: Improper Certificate Validation. A TLS certificate is accepted without proper verification, so a man-in-the-middle can present their own.

Affected software

CVE-2023-29000 is recorded against 1 package.

desktop (from 3.0.0 up to 3.7.0)

Timeline and source

Published on 4 April 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
hackerone.com
github.com
github.com
hackerone.com

CVE-2023-29000 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity MEDIUM

CVSS Score 5.4

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

CWE CWE-295

Public Exploit ✅ No

Source NVD

Published 2023-04-04

Updated 2026-08-11

Modified 2026-06-17

Fix URL https://github.com/nextcloud/desktop/pull/4949

Affected Packages

Software	From version	Fixed in
desktop	3.0.0	3.7.0

References

Patch https://github.com/nextcloud/desktop/pull/4949

Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-98q3-7534

Permissions Required https://hackerone.com/reports/1679267

Patch https://github.com/nextcloud/desktop/pull/4949

Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-98q3-7534

Permissions Required https://hackerone.com/reports/1679267

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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