# CVE-2024-38857: Reflected links in visuals facilitate phishing attacks

> Attackers can craft malicious links in Checkmk visuals to facilitate phishing attacks by exploiting improper input neutralization.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:** 2 Jul 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-2wgx-wf8j-j28h, UBUNTU-CVE-2024-38857

## What is CVE-2024-38857?

CVE-2024-38857 is a medium-severity cross-site scripting vulnerability in Checkmk Checkmk, published on 2 Jul 2024. 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

Improper neutralization of input in Checkmk before versions 2.3.0p8, 2.2.0p28, 2.1.0p45, and 2.0.0 (EOL) allows attackers to craft malicious links that can facilitate phishing attacks.

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

## Which versions are affected by CVE-2024-38857?

It affects 1 product.


Products: Checkmk Checkmk.

## How do I fix CVE-2024-38857?

No fix has been published for CVE-2024-38857 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-38857 being exploited?

There is no known exploitation of CVE-2024-38857 in the wild and no public exploit code.

## Other vulnerabilities in Checkmk Checkmk

- [CVE-2025-39666](https://insights.sbomify.com/CVE-2025-39666/): omd: Local privilege escalation when executing omd commands as root (critical 9.3)
- [CVE-2024-8606](https://insights.sbomify.com/CVE-2024-8606/): Fix 2FA bypass via RestAPI (critical 9.2)
- [CVE-2022-46836](https://insights.sbomify.com/CVE-2022-46836/): PHP code injection in watolib (critical 9.1)
- [CVE-2025-32919](https://insights.sbomify.com/CVE-2025-32919/): Privilege Escalation in Windows License plugin for Checkmk Windows Agent (high 8.8)
- [CVE-2024-28827](https://insights.sbomify.com/CVE-2024-28827/): Privilege escalation in Windows agent (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-38857 and fix it if it is affected.

What it is: CVE-2024-38857 is a medium-severity cross-site scripting vulnerability in Checkmk Checkmk, published on 2 Jul 2024. 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-2024-38857 in the wild and no public exploit code.

Affected product: Checkmk Checkmk. 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-2024-38857/ (Markdown: https://insights.sbomify.com/CVE-2024-38857/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-38857
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-38857
- OSV: https://osv.dev/vulnerability/CVE-2024-38857

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-38857/
Summaries are generated and may contain mistakes; the official description above is the record.