CVE-2026-21879: Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows…

PriorityP431medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

0.26%

17.5th percentile

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
debian	kanboard	< kanboard 1.2.49+ds-1 (forky)	kanboard 1.2.49+ds-1 (forky)
kanboard	kanboard	< 1.2.49	1.2.49
kanboard	kanboard	>= 0 < 1.2.49+ds-1	1.2.49+ds-1

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

osv6.1MEDIUM

vendor_debian4.7MEDIUM

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