# CVE-2020-11547: Information disclosure in n/a

> Remote unauthenticated attackers can obtain sensitive system information from PRTG Network Monitor via HTTP requests.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rmq4-f55m-47cv

## What is CVE-2020-11547?

CVE-2020-11547 is a medium-severity vulnerability in n/a, published on 4 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

PRTG Network Monitor before 20.1.57.1745 allows remote unauthenticated attackers to obtain information about probes running or the server itself (CPU usage, memory, Windows version, and internal statistics) via an HTTP request, as demonstrated by type=probes to login.htm or index.htm.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2020-11547?

It affects 1 product.


Products: Paessler Prtg Network Monitor.

## How do I fix CVE-2020-11547?

No fix has been published for CVE-2020-11547 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-11547 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-11547 exists.

Public exploit code:

- https://github.com/ch-rigu/CVE-2020-11547--PRTG-Network-Monitor-Information-Disclosure (github_poc): https://github.com/ch-rigu/CVE-2020-11547--PRTG-Network-Monitor-Information-Disclosure
- PRTG Network Monitor <20.1.57.1745 - Information Disclosure (nuclei): http/cves/2020/CVE-2020-11547.yaml

## Other vulnerabilities in n/a

- [CVE-2018-19410](https://insights.sbomify.com/CVE-2018-19410/): Paessler PRTG Network Monitor Local File Inclusion (critical 9.8, exploited in the wild)
- [CVE-2018-9276](https://insights.sbomify.com/CVE-2018-9276/): Paessler PRTG Network Monitor OS Command Injection (high 7.2, exploited in the wild)
- [CVE-2020-10374](https://insights.sbomify.com/CVE-2020-10374/): Command injection in n/a (critical 9.8)
- [CVE-2023-51630](https://insights.sbomify.com/CVE-2023-51630/): Paessler PRTG Network Monitor Cross-Site Scripting Authentication Bypass Vulnerability (high 8.8)
- [CVE-2023-31452](https://insights.sbomify.com/CVE-2023-31452/): Cross-site request forgery in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-11547 and fix it if it is affected.

What it is: CVE-2020-11547 is a medium-severity vulnerability in n/a, published on 4 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-11547 exists.

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-2020-11547/ (Markdown: https://insights.sbomify.com/CVE-2020-11547/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-11547
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-11547
- OSV: https://osv.dev/vulnerability/CVE-2020-11547

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-11547/
Summaries are generated and may contain mistakes; the official description above is the record.