🛡️ CVE-2021-23400 — nodemailer

⚪ Unknown ✅ No Known Exploit CWE-74 OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

Header injection in nodemailer

The package nodemailer before 6.6.1 are vulnerable to HTTP Header Injection if unsanitized user input that may contain newlines and carriage returns is passed into an address object.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2021-23400 is classified as CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'). The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or…

Affected software

CVE-2021-23400 is recorded against 1 package.

nodemailer

Timeline and source

Published on 10 December 2021 and last revised on 14 January 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
snyk.io (Web)
snyk.io (Web)

CVE-2021-23400 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CWE CWE-74

Public Exploit ✅ No

Source OSV

Published 2021-12-10

Updated 2026-08-12

Modified 2025-01-14

Fix URL N/A

Affected Packages

Software	From version	Fixed in
nodemailer	—	—

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-23400

WEB https://github.com/nodemailer/nodemailer/issues/1289

WEB https://github.com/nodemailer/nodemailer/commit/7e02648cc8cd863f5085bad3cd09087bccf84b9f

WEB https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1314737

WEB https://snyk.io/vuln/SNYK-JS-NODEMAILER-1296415

🔗 NVD 🔗 Mitre

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