HTML Injection Vulnerability in Mailgen by Elad Nava
CVE-2025-59526

2.7LOW

Key Information:

Vendor

Eladnava

Status
Mailgen
Vendor
CVE Published:
22 September 2025

What is CVE-2025-59526?

The Mailgen package for Node.js, used to generate responsive HTML emails for transactional purposes, has a vulnerability that allows HTML injection in plaintext emails. This occurs when user-generated content is passed to the Mailgen.generatePlaintext(email) method before version 2.0.30. If exploited, this weakness can enable attackers to insert arbitrary HTML into the generated emails, potentially allowing for phishing or other malicious activities. Users are advised to upgrade to version 2.0.30 or later, or alternatively, to apply a workaround by stripping all HTML tags from the content before processing it with Mailgen.

Affected Version(s)

mailgen < 2.0.30

References

https://github.com/eladnava/mailgen/security/advisories/G...
x_refsource_CONFIRM
https://github.com/eladnava/mailgen/commit/741a0190ddae0f...
x_refsource_MISC

CVSS V4

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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