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.
History

Mon, 05 Jan 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Nadh
Nadh listmonk
Vendors & Products Nadh
Nadh listmonk

Fri, 02 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 02 Jan 2026 21:15:00 +0000

Type Values Removed Values Added
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.
Title listmonk Vulnerable to Stored XSS Leading to Admin Account Takeover
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-01-02T20:57:29.332Z

Updated: 2026-01-02T21:18:57.834Z

Reserved: 2025-12-29T14:34:16.005Z

Link: CVE-2026-21483

cve-icon Vulnrichment

Updated: 2026-01-02T21:18:46.885Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-02T21:16:03.217

Modified: 2026-01-08T18:09:49.800

Link: CVE-2026-21483

cve-icon Redhat

No data.