Vulnerability-Lookup

CVE-2026-42558 (GCVE-0-2026-42558)

Vulnerability from cvelistv5 – Published: 2026-06-10 21:39 – Updated: 2026-06-11 12:45

Title

Xibo Vulnerable to Stored XSS and Iframe Sandbox Escape via Data Connector Script in DataSet

Summary

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.

Severity

7.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116 - Improper Encoding or Escaping of Output
CWE-346 - Origin Validation Error

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/xibosignage/xibo-cms/security/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
xibosignage	xibo-cms	Affected: < 4.4.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42558",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-11T12:45:18.666402Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-06-11T12:45:36.280Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "product": "xibo-cms",
          "vendor": "xibosignage",
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          "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."
        }
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
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              "description": "CWE-116: Improper Encoding or Escaping of Output",
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              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-10T21:39:09.547Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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          "url": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-6389-j56c-9fww"
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      ],
      "source": {
        "advisory": "GHSA-6389-j56c-9fww",
        "discovery": "UNKNOWN"
      },
      "title": "Xibo Vulnerable to Stored XSS and Iframe Sandbox Escape via Data Connector Script in DataSet"
    }
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  "cveMetadata": {
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    "datePublished": "2026-06-10T21:39:09.547Z",
    "dateReserved": "2026-04-28T16:56:50.192Z",
    "dateUpdated": "2026-06-11T12:45:36.280Z",
    "state": "PUBLISHED"
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  }
}

FKIE_CVE-2026-42558

Vulnerability from fkie_nvd - Published: 2026-06-10 23:16 - Updated: 2026-07-23 09:10

Severity

7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-6389-j56c-9fww

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "xibo-cms",
          "vendor": "xibosignage",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.4.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "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 se\u00f1alizaci\u00f3n digital de c\u00f3digo abierto con un sistema de gesti\u00f3n de contenido web y software de reproductor de pantalla para Windows. Antes de la versi\u00f3n 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 explotaci\u00f3n 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 est\u00e1ndar: Incluir el bot\u00f3n \u0027A\u00f1adir DataSet\u0027 para permitir que se creen DataSets adicionales independientemente de los Dise\u00f1os. Los usuarios deber\u00edan actualizar a la versi\u00f3n 4.4.2, la cual corrige este problema. La actualizaci\u00f3n a una versi\u00f3n corregida es necesaria para remediar. Los usuarios que no puedan actualizar deber\u00edan revocar dichos privilegios a los usuarios en los que no conf\u00edan."
    }
  ],
  "id": "CVE-2026-42558",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
          "version": "3.1"
        },
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        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-11T12:45:18.666402Z",
          "version": "2.0.3"
        }
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  "published": "2026-06-10T23:16:46.263",
  "references": [
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    }
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
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        },
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        }
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      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-42558 (GCVE-0-2026-42558)

FKIE_CVE-2026-42558

Tags

Sightings

Nomenclature