CVE-2026-21879

MEDIUM EPSS 17.3%
Published Jan 8, 20265mo ago · Modified Jun 17, 20262w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Jan 8, 2026 5mo ago
Last Modified Jun 17, 2026 2w 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.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
17.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-601

Affected Products 1

VendorProductVersionRange
kanboardkanboard* <1.2.49

References 3

  • github.com https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f
    Patch
  • github.com https://github.com/kanboard/kanboard/releases/tag/v1.2.49
    Release Notes
  • github.com https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq
    ExploitThird Party Advisory

Remediation

  • github.com https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f
    Patch