# CVE-2022-39331: Cross-site Scripting (XSS) in Nexcloud Desktop Client

> An attacker can inject arbitrary HTML into the Nextcloud Desktop Client notifications, potentially leading to code execution.

- **Severity:** Medium 4.6 (`CVSS:3.1/AV:N/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:** Over the internet
- **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-2022-39331, GHSA-c3xh-q694-6rc5, UBUNTU-CVE-2022-39331

## What is CVE-2022-39331?

CVE-2022-39331 is a medium-severity cross-site scripting vulnerability in nextcloud security-advisories, published on 25 Nov 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperText Markup Language into the Desktop Client application in the notifications. It is recommended that the Nextcloud Desktop client is upgraded to 3.6.1. There are no known workarounds for this issue.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2022-39331?

It affects 1 product.


Products: Nextcloud Desktop.

## How do I fix CVE-2022-39331?

Upgrade to a fixed version.

## Is CVE-2022-39331 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-39331 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-2022-39331 and fix it if it is affected.

What it is: CVE-2022-39331 is a medium-severity cross-site scripting vulnerability in nextcloud security-advisories, published on 25 Nov 2022. Any signed-in user can exploit it over the 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-2022-39331 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-2022-39331/ (Markdown: https://insights.sbomify.com/CVE-2022-39331/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-39331
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-39331
- OSV: https://osv.dev/vulnerability/CVE-2022-39331

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-39331/
Summaries are generated and may contain mistakes; the official description above is the record.