Description
HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner's configured sending identity, via the first_name field of the subscription request, which is interpolated unescaped into the double opt-in verification email.
Published: 2026-08-18
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to version 1.1.3 or higher.

Tracking

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Advisories

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History

Tue, 18 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Description HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner's configured sending identity, via the first_name field of the subscription request, which is interpolated unescaped into the double opt-in verification email.
Title HTML Injection in MailerUp double opt-in verification email
First Time appeared Maalfer
Maalfer mailerup
Weaknesses CWE-80
CPEs cpe:2.3:a:maalfer:mailerup:*:*:*:*:*:*:*:*
Vendors & Products Maalfer
Maalfer mailerup
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Maalfer Mailerup
cve-icon MITRE

Status: PUBLISHED

Assigner: Secur0

Published:

Updated: 2026-08-18T16:04:29.499Z

Reserved: 2026-08-18T12:20:39.352Z

Link: CVE-2026-75872

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-18T15:17:15.150

Modified: 2026-08-18T16:18:21.930

Link: CVE-2026-75872

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-80

    Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)