CVE-2026-21879

https://target-kanboard.com/redirect?url=//evil.com

{"cve": {"id": "CVE-2026-21879", "sourceIdentifier": "[email protected]", "published": "2026-01-08T02:15:53.490", "lastModified": "2026-01-20T18:15:10.597", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49."}, {"lang": "es", "value": "Kanboard es un software de gestión de proyectos centrado en la metodología Kanban. Las versiones 1.2.48 e inferiores son vulnerables a un ataque de redirección abierta que permite a actores maliciosos redirigir a usuarios autenticados a sitios web controlados por el atacante. Al elaborar URLs como //evil.com, los atacantes pueden eludir la comprobación de validación filter_var($url, FILTER_VALIDATE_URL). Esta vulnerabilidad podría ser explotada para llevar a cabo ataques de phishing, robar credenciales de usuario o distribuir malware. El problema está solucionado en la versión 1.2.49."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N", "baseScore": 4.7, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-601"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.49", "matchCriteriaId": "AFA1D972-E76A-4A20-95F5-68D9915D3797"}]}]}], "references": [{"url": "https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/kanboard/kanboard/releases/tag/v1.2.49", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}