---
title: "CVE-2024-27448: MailDev Remote Code Execution"
url: https://erroneo.us/security/cve/CVE-2024-27448/
description: "CVE-2024-27448 (maildev (npm)): MailDev 2 through 2.1.0 allows Remote Code Execution via a crafted Content-ID header for an e-mail attachment, leading to…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-04-05
date_modified: 2025-03-14
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-27448"
kev: false
cvss: 9.1
epss: 0.00904
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-27448: MailDev Remote Code Execution

**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?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.9% , percentile 59: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 59% of all scored CVEs (moderate). 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 maildev (npm) >= 2.0.0-beta1, <= 2.1.0, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

MailDev 2 through 2.1.0 allows Remote Code Execution via a crafted Content-ID header for an e-mail attachment, leading to lib/mailserver.js writing arbitrary code into the routes.js file.

## Affected packages

- npm `maildev` >= 2.0.0-beta1, <= 2.1.0 → 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: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.90% probability of exploitation activity in the next 30 days; percentile 59.

## Sources

- [GitHub Advisory GHSA-vc6q-ccj9-9r89](https://github.com/advisories/GHSA-vc6q-ccj9-9r89)
- [CVE.org record CVE-2024-27448](https://www.cve.org/CVERecord?id=CVE-2024-27448)
- [NVD entry CVE-2024-27448](https://nvd.nist.gov/vuln/detail/CVE-2024-27448)
- [github.com](https://github.com/Tim-Hoekstra/MailDev-2.1.0-Exploit-RCE)
- [github.com](https://github.com/maildev/maildev/releases)
- [intrix.com.au](https://intrix.com.au/articles/exposing-major-security-flaw-in-maildev)
- [github.com](https://github.com/maildev/maildev/issues/467)
- [gist.github.com](https://gist.github.com/stypr/fe2003f00959f7e3d92ab9d5260433f8)

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Source page: https://erroneo.us/security/cve/CVE-2024-27448/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt