# CVE-2019-15619: Cross-site scripting in Nextcloud Server

> Cross-site scripting vulnerability in Nextcloud allows attackers to execute scripts via malicious file, conversation, or board names.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Feb 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-mvc5-w9jr-jvqm

## What is CVE-2019-15619?

CVE-2019-15619 is a medium-severity cross-site scripting vulnerability in Nextcloud Nextcloud Server, published on 4 Feb 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Improper neutralization of file names, conversation names and board names in Nextcloud Server 16.0.3, Nextcloud Talk 6.0.3 and Nextcloud Deck 0.6.5 causes an XSS when linking them with each others in a project.

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

## Which versions are affected by CVE-2019-15619?

It affects 3 products.


Products: Nextcloud Deck, Nextcloud Nextcloud Server, Nextcloud Talk.

## How do I fix CVE-2019-15619?

No fix has been published for CVE-2019-15619 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-15619 being exploited?

There is no known exploitation of CVE-2019-15619 in the wild and no public exploit code.

## Other vulnerabilities in Nextcloud Nextcloud Server

- [CVE-2021-39225](https://insights.sbomify.com/CVE-2021-39225/): Missing permission check on Deck API (high 8.1)
- [CVE-2020-8182](https://insights.sbomify.com/CVE-2020-8182/): Missing authorization in Nextcloud Deck (high 8.0)
- [CVE-2021-37631](https://insights.sbomify.com/CVE-2021-37631/): Circle can be accessed by non-Circle members in Nextcloud Deck (medium 6.5)
- [CVE-2021-22913](https://insights.sbomify.com/CVE-2021-22913/): Information disclosure in Nextcloud Deck (medium 6.5)
- [CVE-2023-22469](https://insights.sbomify.com/CVE-2023-22469/): Nextcloud Deck card vulnerable to data leak to unauthorized users via reference preview cache (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-15619 and fix it if it is affected.

What it is: CVE-2019-15619 is a medium-severity cross-site scripting vulnerability in Nextcloud Nextcloud Server, published on 4 Feb 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-15619 in the wild and no public exploit code.

Affected product: Nextcloud Nextcloud Server. 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-2019-15619/ (Markdown: https://insights.sbomify.com/CVE-2019-15619/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15619
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15619
- OSV: https://osv.dev/vulnerability/CVE-2019-15619

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-15619/
Summaries are generated and may contain mistakes; the official description above is the record.