CVE-2026-75872: CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS) in maalfer MailerUp
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.
CVE-2026-75872: CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS) in maalfer MailerUp
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.
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Secur0
- Date Reserved
- 2026-08-18T12:20:39.352Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a846a53c6e8be033250a773
Added to database: 08/18/2026, 14:21:07 UTC
Last updated: 08/18/2026, 14:21:07 UTC
Views: 1
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