CVE-2026-42558

{
  "id": "CVE-2026-42558",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42558",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-11T12:45:18.666402Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "xibosignage",
          "product": "xibo-cms",
          "versions": [
            {
              "status": "affected",
              "version": "< 4.4.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-10T23:16:46.263",
  "references": [
    {
      "url": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-6389-j56c-9fww",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-116"
        },
        {
          "lang": "en",
          "value": "CWE-346"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.2, a vulnerability chain consisting of Stored XSS and Iframe Sandbox escape in the Xibo CMS allows users with DataSet permissions to use the Data Connector functionality to craft messages which escape the sandbox and facilitate XSS. Exploitation of the vulnerability is possible on behalf of an authorized user who has both of the following privileges, which are not granted to non-admins as standard: Include \"Add DataSet\" button to allow for additional DataSets to be created independently to Layouts Users should upgrade to version 4.4.2 which fixes this issue. Upgrading to a fixed version is necessary to remediate. Users unable to upgrade should revoke such privileges from users they do not trust."
    },
    {
      "lang": "es",
      "value": "Xibo es una plataforma de señalización digital de código abierto con un sistema de gestión de contenido web y software de reproductor de pantalla para Windows. Antes de la versión 4.4.2, una cadena de vulnerabilidades que consiste en XSS Almacenado y escape de Sandbox de Iframe en el CMS de Xibo permite a los usuarios con permisos de DataSet utilizar la funcionalidad de Conector de Datos para crear mensajes que escapan del sandbox y facilitan XSS. La explotación de la vulnerabilidad es posible por parte de un usuario autorizado que tiene ambos de los siguientes privilegios, los cuales no se otorgan a usuarios no administradores de forma estándar: Incluir el botón 'Añadir DataSet' para permitir que se creen DataSets adicionales independientemente de los Diseños. Los usuarios deberían actualizar a la versión 4.4.2, la cual corrige este problema. La actualización a una versión corregida es necesaria para remediar. Los usuarios que no puedan actualizar deberían revocar dichos privilegios a los usuarios en los que no confían."
    }
  ],
  "lastModified": "2026-07-23T09:10:00.113",
  "sourceIdentifier": "security-advisories@github.com"
}