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CVE-2025-59526

Mailgen: HTML injection vulnerability in plaintext e-mails

LOW
2.7
CVSS Score
Published: September 22, 2025 at 07:27 PM UTC
Updated: October 11, 2026 at 08:10 PM UTC
1 product affected across 1 vendorMailgen

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Severity
LOW2.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Prior to version 2.0.30, there is an HTML injection vulnerability in plaintext e-mails generated by Mailgen. Projects are affected if the Mailgen.generatePlaintext(email) method is used and given user-generated content. This vulnerability has been patched in version 2.0.30. A workaround involves stripping all HTML tags before passing any content into Mailgen.generatePlaintext(email).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mailgen· Eladnava
90%
v < 2.0.30
Affected range stops below 2.0.30, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_CONFIRM
Source: cverecord
https://github.com/eladnava/mailgen/security/advisories/GHSA-j2xj-h7w5-r7vp
x_refsource_MISC
Source: cverecord
https://github.com/eladnava/mailgen/commit/741a0190ddae0f408b22ae3b5f0f4c3f5cf4f11d

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

2.7LOWGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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