---
title: "CVE-2023-51839: DeviceFarmer stf uses DES-ECB"
url: https://erroneo.us/security/cve/CVE-2023-51839/
description: "CVE-2023-51839 (@devicefarmer/stf (npm)): DeviceFarmer stf v3.6.6 suffers from Use of a Broken or Risky Cryptographic Algorithm."
type: vulnerability-record
section: "Security Digest"
date_published: 2024-01-29
date_modified: 2025-06-20
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-51839"
kev: false
cvss: 9.1
epss: 0.00376
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-51839: DeviceFarmer stf uses DES-ECB

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.4% , percentile 30: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 30% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes @devicefarmer/stf (npm) <= 3.6.6, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

DeviceFarmer stf v3.6.6 suffers from Use of a Broken or Risky Cryptographic Algorithm.

## Affected packages

- npm `@devicefarmer/stf` <= 3.6.6 → fixed: none listed

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.38% probability of exploitation activity in the next 30 days; percentile 30.

## Sources

- [GitHub Advisory GHSA-7xm8-wjq7-88r5](https://github.com/advisories/GHSA-7xm8-wjq7-88r5)
- [CVE.org record CVE-2023-51839](https://www.cve.org/CVERecord?id=CVE-2023-51839)
- [NVD entry CVE-2023-51839](https://nvd.nist.gov/vuln/detail/CVE-2023-51839)
- [github.com](https://github.com/DeviceFarmer/stf/issues/736)
- [github.com](https://github.com/DeviceFarmer/stf)
- [github.com](https://github.com/tianjk99/Cryptographic-Misuses/blob/main/CVE-2023-51839.md)
- [github.com](https://github.com/DeviceFarmer/stf/blob/a6b5f18941d0de5929f9c24c3ce3e9c13317a653/lib/util/vncauth.js#L35)

---
Source page: https://erroneo.us/security/cve/CVE-2023-51839/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt