Security Digest · Vulnerability record
CVE-2024-27448: MailDev Remote Code Execution
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.
CVSS 9.1 Critical EPSS 0.9% · p59
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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.
From the GitHub advisory
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.
Weakness type: CWE-352, CWE-22.
Product: maildev (npm) · Assigned by: mitre · Published: 2024-04-05
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| npm | maildev | >= 2.0.0-beta1, <= 2.1.0 | none listed |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record published by mitre
- — GitHub-reviewed advisory GHSA-vc6q-ccj9-9r89 published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-vc6q-ccj9-9r89 github.com
- CVE.org record CVE-2024-27448 cve.org
- NVD entry CVE-2024-27448 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- github.com github.com
- intrix.com.au intrix.com.au
- github.com github.com
- gist.github.com gist.github.com