Missing Authorization in Wekan - #VU139850
Published: July 28, 2026
Vulnerability identifier: #VU139850
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: wekan.github.io
Affected software:
Wekan
Wekan
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the Excel-export route /api/boards/:boardId/exportExcel when handling export requests because the async canExport() authorization check is called without await. A remote user can send a crafted export request for a private board to disclose sensitive information.
The issue affects authenticated non-members and can expose the full contents of private boards, including card titles, descriptions, lists, swimlanes, members, and metadata.
Remediation
Install security update from vendor's website.