---
id: CVE-2025-62380
title: >-
  mailgen is a Node.js package that generates responsive HTML e-mails for
  sending transactional mail
summary: >-
  mailgen is a Node.js package that generates responsive HTML e-mails for
  sending transactional mail. Mailgen versions through 2.0.31 contain an HTML
  injection vulnerability in plaintext emails generated with the
  generatePlaintext method w…
severity: none
cwe:
  - CWE-79
published: '2025-10-15'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:10:00.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62380'
references:
  - url: >-
      https://github.com/eladnava/mailgen/commit/7a791a424ff3a3f7783f8750919f1e98639924a8
    label: security-advisories@github.com
  - url: >-
      https://github.com/eladnava/mailgen/security/advisories/GHSA-q4w9-x3rv-4c8j
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00452
epssPercentile: 0.36941
ingestedAt: '2026-09-30T23:29:32.432Z'
---

## Overview

mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Mailgen versions through 2.0.31 contain an HTML injection vulnerability in plaintext emails generated with the generatePlaintext method when user generated content is supplied. The plaintext generation code attempts to strip HTML tags using a regular expression and then decodes HTML entities, but tags that include certain Unicode line separator characters are not matched and removed. These encoded tags are later decoded into valid HTML content, allowing unexpected HTML to remain in output intended to be plaintext. Projects are affected if they call Mailgen.generatePlaintext with untrusted input and then render or otherwise process the returned string in a context where HTML is interpreted. This can lead to execution of attacker supplied script in the victim’s browser. Version 2.0.32 fixes the issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.