listmonk: Broken Access Control in CSV Import (Unauthorized List Assignment)

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-34584
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-02 18:16:30 UTC
Updated2026-04-02 18:16:30 UTC
Descriptionlistmonk is a standalone, self-hosted, newsletter and mailing list manager. From version 4.1.0 to before version 6.1.0, bugs in list permission checks allows users in a multi-user environment to access to lists (which they don't have access to) under different scenarios. This only affects multi-user environments with untrusted users. This issue has been patched in version 6.1.0.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Knadh Listmonk affected >= 4.1.0, < 6.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35 [email protected] github.com
github.com/knadh/listmonk/releases/tag/v6.1.0 [email protected] github.com
github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv [email protected] github.com
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