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I. Basic Information for CVE-2026-21483
Vulnerability Information

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Vulnerability Title
listmonk Vulnerable to Stored XSS Leading to Admin Account Takeover
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
listmonk 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
listmonk是Kailash Nadh个人开发者的一个具有现代仪表板的高性能、自托管、时事通讯和邮件列表管理器。 listmonk 6.0.0之前版本存在跨站脚本漏洞,该漏洞源于低权限用户可注入恶意JavaScript,可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
knadhlistmonk < 6.0.0 -
II. Public POCs for CVE-2026-21483
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III. Intelligence Information for CVE-2026-21483
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IV. Related Vulnerabilities
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