# CVE-2019-12512: Stored XSS via X-Forwarded-For Header During Incorrect Login

> An attacker can inject malicious scripts into router logs via the X-Forwarded-For header, leading to stored XSS when administrators view the logs.

- **Severity:** Medium 6.1 (`CVSS:3.1/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:** 24 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wmp4-2x9h-3x8f

## What is CVE-2019-12512?

CVE-2019-12512 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Feb 2020. 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

In NETGEAR Nighthawk X10-R900 prior to 1.0.4.24, an attacker may execute stored XSS attacks against this device by supplying a malicious X-Forwarded-For header while performing an incorrect login attempt. The value supplied by this header will be inserted into administrative logs, found at Advanced settings->Administration->Logs, and may trigger when the page is viewed. Although this value is inserted into a textarea tag, the attack simply needs to supply a closing textarea tag.

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

## Which versions are affected by CVE-2019-12512?

It affects 1 product.


Products: Netgear Nighthawk X10-R9000 Firmware.

## How do I fix CVE-2019-12512?

No fix has been published for CVE-2019-12512 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-12512 being exploited?

There is no known exploitation of CVE-2019-12512 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-12511](https://insights.sbomify.com/CVE-2019-12511/): Root Command Injection via MAC Address in SOAP API (critical 9.8)
- [CVE-2019-12510](https://insights.sbomify.com/CVE-2019-12510/): Auth Bypass Via X-Forwarded-For Header in SOAP API (critical 9.1)
- [CVE-2019-12513](https://insights.sbomify.com/CVE-2019-12513/): Stored XSS via DHCP Discover Request Hostname (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12512 and fix it if it is affected.

What it is: CVE-2019-12512 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Feb 2020. 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-2019-12512 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-2019-12512/ (Markdown: https://insights.sbomify.com/CVE-2019-12512/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12512
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12512
- OSV: https://osv.dev/vulnerability/CVE-2019-12512

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-12512/
Summaries are generated and may contain mistakes; the official description above is the record.