SB2026080393 - Multiple vulnerabilities in Wekan

Description

This security bulletin contains information about 2 vulnerabilities.

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

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

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N]

The vulnerability allows a remote user to disclose sensitive information from internal resources.

The vulnerability exists due to server-side request forgery in the live Trello import download path when processing attacker-controlled attachment URLs that redirect after validation. A remote user can supply a public URL that redirects to an internal address to disclose sensitive information from internal resources.

The issue is non-blind because the fetched response body is stored as an imported attachment and can be read back through Wekan.

2) Input validation error (CVE-ID: N/A)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 7.1 [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]

The vulnerability allows a remote user to disclose sensitive information from internal services.

The vulnerability exists due to improper input validation in attachment URL validation and webhook delivery SSRF guard when processing user-supplied URLs. A remote user can supply a URL using an IPv6 transition address that embeds a private IPv4 destination to disclose sensitive information from internal services.

On affected deployments, the issue can expose responses from cloud metadata endpoints and other reachable RFC 1918, loopback, or link-local hosts.

Remediation

Install update from vendor's website.

References

• https://github.com/wekan/wekan/security/advisories/GHSA-j9p2-jm73-p549
• https://github.com/wekan/wekan/security/advisories/GHSA-c5xr-mg26-vq5w