# CVE-2023-23449: Information disclosure in SICK FTMG-ESD15AXX AIR FLOW SENSOR

> Remote attackers can enumerate valid usernames by analyzing REST interface response discrepancies in SICK FTMg air flow sensors.

- **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:** 15 May 2023
- **Updated:** 1 Jun 2026
- **Also known as:** GHSA-gwww-55j7-6p52

## What is CVE-2023-23449?

CVE-2023-23449 is a medium-severity vulnerability in SICK FTMG-ESD15AXX AIR FLOW SENSOR, published on 15 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Observable Response Discrepancy in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows a remote attacker
to gain information about valid usernames by analyzing challenge responses from the server via the
REST interface.

Weakness: CWE-203 (Observable Discrepancy), CWE-204 (Observable Response Discrepancy)

## Which versions are affected by CVE-2023-23449?

It affects 7 products.


Products: Sick Ftmg-Esd15axx Firmware, Sick Ftmg-Esd20axx Firmware, Sick Ftmg-Esd25axx Firmware, Sick Ftmg-Esn40sxx Firmware, Sick Ftmg-Esn50sxx Firmware, Sick Ftmg-Esr40sxx Firmware, Sick Ftmg-Esr50sxx Firmware.

## How do I fix CVE-2023-23449?

No fix has been published for CVE-2023-23449 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-23449 being exploited?

There is no known exploitation of CVE-2023-23449 in the wild and no public exploit code.

## Other vulnerabilities in SICK FTMG-ESD15AXX AIR FLOW SENSOR

- [CVE-2023-23445](https://insights.sbomify.com/CVE-2023-23445/): Missing authorization in SICK FTMG-ESD15AXX AIR FLOW SENSOR (high 7.5)
- [CVE-2023-23446](https://insights.sbomify.com/CVE-2023-23446/): Missing authorization in SICK FTMG-ESD15AXX AIR FLOW SENSOR (high 7.5)
- [CVE-2023-23447](https://insights.sbomify.com/CVE-2023-23447/): Denial of service in SICK FTMG-ESD15AXX AIR FLOW SENSOR (high 7.5)
- [CVE-2023-23450](https://insights.sbomify.com/CVE-2023-23450/): Auth bypass in SICK FTMG-ESD15AXX AIR FLOW SENSOR (medium 6.2)
- [CVE-2023-23448](https://insights.sbomify.com/CVE-2023-23448/): Information disclosure in SICK FTMG-ESD15AXX AIR FLOW SENSOR (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23449 and fix it if it is affected.

What it is: CVE-2023-23449 is a medium-severity vulnerability in SICK FTMG-ESD15AXX AIR FLOW SENSOR, published on 15 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-23449 in the wild and no public exploit code.

Affected product: SICK FTMG-ESD15AXX AIR FLOW SENSOR. 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-2023-23449/ (Markdown: https://insights.sbomify.com/CVE-2023-23449/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23449
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23449
- OSV: https://osv.dev/vulnerability/CVE-2023-23449

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23449/
Summaries are generated and may contain mistakes; the official description above is the record.