CVE-2026-75872
HTML Injection in MailerUp double opt-in verification email
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Reserved
- Aug 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | Secur0 |
Weaknesses
- CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Affected Products
| Product | Versions |
|---|---|
MailerUpmaalfer |
|
References
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