# CVE-2019-9834: Cross-site scripting in n/a

> Remote attackers can inject malicious HTML into Netdata snapshots, enabling credential theft or site manipulation via stored XSS.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Mar 2019
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-9834, GHSA-25rc-9mcg-m884

## What is CVE-2019-9834?

CVE-2019-9834 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Mar 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Netdata web application through 1.13.0 allows remote attackers to inject their own malicious HTML code into an imported snapshot, aka HTML Injection. Successful exploitation will allow attacker-supplied HTML to run in the context of the affected browser, potentially allowing the attacker to steal authentication credentials or to control how the site is rendered to the user. NOTE: the vendor disputes the risk because there is a clear warning next to the button for importing a snapshot

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

## Which versions are affected by CVE-2019-9834?

It affects 1 product.


Products: Netdata Netdata.

## How do I fix CVE-2019-9834?

No fix has been published for CVE-2019-9834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-9834 being exploited?

There is no known exploitation of CVE-2019-9834 in the wild and no public exploit code.

Public exploit code:

- NetData 1.13.0 - HTML Injection (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2023-22496](https://insights.sbomify.com/CVE-2023-22496/): Netdata vulnerable to command injection (high 8.1)
- [CVE-2023-22497](https://insights.sbomify.com/CVE-2023-22497/): Netdata is vulnerable to improper authentication (medium 6.5)
- [CVE-2025-71385](https://insights.sbomify.com/CVE-2025-71385/): Netdata < 2.3.1 - Reflected Cross-Site Scripting via love Parameter in ilove.svg Endpoint (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9834 and fix it if it is affected.

What it is: CVE-2019-9834 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Mar 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-9834 in the wild and no public exploit code.

Affected product: n/a. 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-2019-9834/ (Markdown: https://insights.sbomify.com/CVE-2019-9834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9834
- OSV: https://osv.dev/vulnerability/CVE-2019-9834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-9834/
Summaries are generated and may contain mistakes; the official description above is the record.