# CVE-2022-39334: nextcloudcmd incorrectly trusts bad TLS certificates

> Nextcloud CLI incorrectly trusts invalid TLS certificates, allowing Man-in-the-Middle attacks to expose sensitive data and credentials.

- **Severity:** Low 3.9 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 25 Nov 2022
- **Updated:** 3 Nov 2025
- **Also known as:** DEBIAN-CVE-2022-39334, GHSA-82xx-98xv-4jxv, UBUNTU-CVE-2022-39334

## What is CVE-2022-39334?

CVE-2022-39334 is a low-severity vulnerability in nextcloud security-advisories, published on 25 Nov 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Nextcloud also ships a CLI utility called nextcloudcmd which is sometimes used for automated scripting and headless servers. Versions of nextcloudcmd prior to 3.6.1 would incorrectly trust invalid TLS certificates, which may enable a Man-in-the-middle attack that exposes sensitive data or credentials to a network attacker. This affects the CLI only. It does not affect the standard GUI desktop Nextcloud clients, and it does not affect the Nextcloud server.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2022-39334?

It affects 1 product.


Products: Nextcloud Desktop.

## How do I fix CVE-2022-39334?

Upgrade to a fixed version.

## Is CVE-2022-39334 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-39334 exists.

## Other vulnerabilities in nextcloud security-advisories

- [CVE-2024-46958](https://insights.sbomify.com/CVE-2024-46958/): Misconfiguration in n/a (critical 9.1)
- [CVE-2020-8224](https://insights.sbomify.com/CVE-2020-8224/): Code injection in Desktop Client (high 7.8)
- [CVE-2020-8225](https://insights.sbomify.com/CVE-2020-8225/): Information disclosure in Desktop Client (high 7.5)
- [CVE-2021-37617](https://insights.sbomify.com/CVE-2021-37617/): Untrusted Search Path in Nextcloud Desktop Client (high 7.3)
- [CVE-2023-28999](https://insights.sbomify.com/CVE-2023-28999/): Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access to E2EE folders (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-39334 and fix it if it is affected.

What it is: CVE-2022-39334 is a low-severity vulnerability in nextcloud security-advisories, published on 25 Nov 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-39334 exists.

Affected product: nextcloud security-advisories. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-39334/ (Markdown: https://insights.sbomify.com/CVE-2022-39334/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-39334
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-39334
- OSV: https://osv.dev/vulnerability/CVE-2022-39334

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-39334/
Summaries are generated and may contain mistakes; the official description above is the record.