CVE-2026-21483

Katalog CVE

CVSS 5.4 · Medium EPSS 0,23%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada nadh listmonk. Skor CVSS 3.1 5.4 (Medium) menurut NVD.

Deskripsi (NVD)

listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to version 6.0.0, lower-privileged user with campaign management permissions can inject malicious JavaScript into campaigns or templates. When a higher-privileged user (Super Admin) views or previews this content, the XSS executes in their browser context, allowing the attacker to perform privileged actions such as creating backdoor admin accounts. The attack can be weaponized via the public archive feature, where victims simply need to visit a link - no preview click required. Version 6.0.0 fixes the issue.

Rincian

Terbit di NVD

2 Januari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

5.4 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

EPSS (30 hari)

0,23% peluang dieksploitasi; lebih tinggi dari 12,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/knadh/listmonk/security/advisories/GHSA-jmr4-p576-v565 exploit · advisory vendor