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CVE-2026-21879

Estado: AnalizadaMedia (6.1)—

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

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Kanboard — Kanboard

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-21879",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21879",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-08T18:34:32.575700Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
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        "exploitabilityScore": 2.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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          "userInteraction": "REQUIRED",
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  "published": "2026-01-08T02:15:53.490",
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      "tags": [
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    {
      "url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq",
      "tags": [
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        "Third Party Advisory"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "security-advisories@github.com",
      "description": [
        {
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          "value": "CWE-601"
        }
      ]
    }
  ],
  "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."
    }
  ],
  "lastModified": "2026-06-17T10:19:04.737",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AFA1D972-E76A-4A20-95F5-68D9915D3797",
              "versionEndExcluding": "1.2.49"
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  "sourceIdentifier": "security-advisories@github.com"
}