CVE-2026-21879 – Kanboard vulnerable to Open Redirect via protocol-relative URLs

CVE ID : CVE-2026-21879

Published : Jan. 8, 2026, 12:51 a.m. | 1 hour, 36 minutes ago

Description : Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49.

Severity: 0.0 | NA

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