Open Redirect Affecting kanboard package, versions <1.2.49+ds-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.3% (23rd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-KANBOARD-14906030
  • published9 Jan 2026
  • disclosed8 Jan 2026

Introduced: 8 Jan 2026

CVE-2026-21879  (opens in a new tab)
CWE-601  (opens in a new tab)

How to fix?

Upgrade Debian:unstable kanboard to version 1.2.49+ds-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kanboard package and not the kanboard package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1