# CVE-2017-11507: Cross-site scripting in Check MK

> Unauthenticated attackers can inject arbitrary HTML or JavaScript via specific parameters in Check_MK, potentially leading to session hijacking or malicious script execution.

- **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:** 11 Dec 2017
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-gg6p-3mxx-fqcj, UBUNTU-CVE-2017-11507

## What is CVE-2017-11507?

CVE-2017-11507 is a medium-severity cross-site scripting vulnerability in Tenable Check_MK, published on 11 Dec 2017. 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

A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.2.8x prior to 1.2.8p25 and 1.4.0x prior to 1.4.0p9, allowing an unauthenticated attacker to inject arbitrary HTML or JavaScript via the output_format parameter, and the username parameter of failed HTTP basic authentication attempts, which is returned unencoded in an internal server error page.

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

## Which versions are affected by CVE-2017-11507?

It affects 1 product.


Products: Check Mk Project Check Mk.

## How do I fix CVE-2017-11507?

No fix has been published for CVE-2017-11507 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-11507 being exploited?

There is no known exploitation of CVE-2017-11507 in the wild and no public exploit code.

## Other vulnerabilities in Tenable Check_MK

- [CVE-2014-5340](https://insights.sbomify.com/CVE-2014-5340/): Deserialization in n/a (critical 9.3)
- [CVE-2014-2331](https://insights.sbomify.com/CVE-2014-2331/): Code injection in n/a (high 8.5)
- [CVE-2014-2330](https://insights.sbomify.com/CVE-2014-2330/): Cross-site request forgery in n/a (medium 6.8)
- [CVE-2017-9781](https://insights.sbomify.com/CVE-2017-9781/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2014-0243](https://insights.sbomify.com/CVE-2014-0243/): Path traversal in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-11507 and fix it if it is affected.

What it is: CVE-2017-11507 is a medium-severity cross-site scripting vulnerability in Tenable Check_MK, published on 11 Dec 2017. 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-2017-11507 in the wild and no public exploit code.

Affected product: Tenable Check_MK. 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-2017-11507/ (Markdown: https://insights.sbomify.com/CVE-2017-11507/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-11507
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-11507
- OSV: https://osv.dev/vulnerability/CVE-2017-11507

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-11507/
Summaries are generated and may contain mistakes; the official description above is the record.