# CVE-2022-48321: SSRF in agent-receiver API

> An attacker can exploit SSRF in the host registration API to access restricted local network endpoints in Checkmk.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Feb 2023
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-q57f-4wj6-3jfc, UBUNTU-CVE-2022-48321

## What is CVE-2022-48321?

CVE-2022-48321 is a medium-severity server-side request forgery vulnerability in Checkmk Checkmk, published on 20 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Limited Server-Side Request Forgery (SSRF) in agent-receiver in Tribe29's Checkmk <= 2.1.0p11 allows an attacker to communicate with local network restricted endpoints by use of the host registration API.

Weakness: CWE-918 (Server-Side Request Forgery), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2022-48321?

It affects 1 product.


Products: Checkmk Checkmk.

## How do I fix CVE-2022-48321?

No fix has been published for CVE-2022-48321 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-48321 being exploited?

There is no known exploitation of CVE-2022-48321 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-2022-48321 and fix it if it is affected.

What it is: CVE-2022-48321 is a medium-severity server-side request forgery vulnerability in Checkmk Checkmk, published on 20 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-48321 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-2022-48321/ (Markdown: https://insights.sbomify.com/CVE-2022-48321/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-48321
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-48321
- OSV: https://osv.dev/vulnerability/CVE-2022-48321

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-48321/
Summaries are generated and may contain mistakes; the official description above is the record.