Wekan: Broken access control in the Excel-export route (`/api/boards/:boardId/exportExcel`)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68559
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 20:17:21 UTC
Updated2026-08-19 20:17:21 UTC
DescriptionWekan is open source kanban built with Meteor. From 9.57 until 9.74, the /api/boards/:boardId/exportExcel route in models/exportExcel.js called the asynchronous exporterExcel.canExport(user) authorization guard from models/server/ExporterExcel.js without awaiting it. The returned Promise was always truthy, so exporterExcel.build(res) ran even when board.isVisibleBy(user) would deny access, allowing any authenticated non-member to download private board card titles, descriptions, lists, swimlanes, members, and metadata. This issue is fixed in version 9.74.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.002940000 probability, percentile 0.220830000 (date 2026-08-20)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wekan Wekan affected >= 9.57, < 9.74 Not specified

References

ReferenceSourceLinkTags
github.com/wekan/wekan/releases/tag/v9.74 [email protected] github.com
github.com/wekan/wekan/commit/7bbd1a3fad5d868fd01d79b5908913e215698e8e [email protected] github.com
github.com/wekan/wekan/security/advisories/GHSA-mwq8-ccpm-r533 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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