CVE-2025-62380Public exploitNetwork attack vector

Browser script execution via Unicode tag-strip bypass

Published Oct 15, 2025 · Updated Oct 15, 2025

Cross-site scripting in Mailgen before 2.0.32 allows remote attackers to execute browser scripts through generated plaintext email. generatePlaintext decodes HTML entities before applying a tag-stripping regular expression that fails to match tags containing Unicode line separators. Reachability requires an application to pass untrusted content to generatePlaintext and later interpret its returned string as HTML, enabling script execution in a victim's browser.

CVSS severityUnavailable
Unscored
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in Mailgen before 2.0.32 allows remote attackers to execute browser scripts through generated plaintext email. generatePlaintext decodes HTML entities before applying a tag-stripping regular expression that fails to match tags containing Unicode line separators. Reachability requires an application to pass untrusted content to generatePlaintext and later interpret its returned string as HTML, enabling script execution in a victim's browser.

The record

CVE
CVE-2025-62380
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
Elad Nava
Product
Mailgen
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.0.32

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Elad Nava · Mailgenversion=< 2.0.32

Published CVSS scores

2.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo