ID:12256 - Exploit for Open redirect in Kanboard - CVE-2026-21879

Link to public exploit:

Vulnerability description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data within protocol-relative URLs. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Remediation