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BDVDB
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Vulnerabilities

CVE-2026-21483 | BDVDB-2026-309015 Detail

knadhlistmonk

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.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact none, availability impact none. Attack vector: network.

Weaknesses#

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

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.