Description

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.

INFO

Published Date :

2026-01-02T20:57:29.332Z

Last Modified :

2026-01-02T21:18:57.834Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21483 vulnerability.

Vendors Products
Nadh
  • Listmonk
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21483.

URL Resource
https://github.com/knadh/listmonk/security/advisories/GHSA-jmr4-p576-v565 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact