SB2026072854 - Multiple vulnerabilities in Wekan

Description

This security bulletin contains information about 2 vulnerabilities.

1) Missing Authorization (CVE-ID: N/A)

CWE-ID: CWE-862 - Missing Authorization

CVSSv4: 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

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.

2) Server-Side Request Forgery (SSRF) (CVE-ID: N/A)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to perform server-side request forgery against internal, loopback, or link-local services.

The vulnerability exists due to improper request validation in the outgoing-webhook URL validator in models/integrations.js when processing webhook URLs that use DNS-resolving hostnames. A remote user can supply a crafted webhook URL whose hostname resolves to a blocked address to perform server-side request forgery against internal, loopback, or link-local services.

The webhook send path does not re-validate the resolved IP address, and the issue is exploitable by a board admin on their own board without user interaction.

Remediation

Install update from vendor's website.

References

• https://github.com/wekan/wekan/security/advisories/GHSA-mwq8-ccpm-r533
• https://github.com/wekan/wekan/security/advisories/GHSA-66m2-4wfr-c45p