CVE-2026-55793

{
  "id": "CVE-2026-55793",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-01T22:16:50.327",
  "lastModified": "2026-10-25T16:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22, an author-level control panel user can store a malicious JavaScript payload in an entry title. When an admin, or any control panel user with saveEntries for the same Structure section, drags another entry under the poisoned entry in table view, the payload executes in the victim’s session. The issue is exploitable because the title is escaped into data-title by the server, decoded again by the browser, read with jQuery .data('title'), and then concatenated into a new HTML string without attribute escaping. To exploit, an attacker must have an existing control panel account (Author role minimum), the victim must perform a drag operation (not just visit the page), and the victim’s session needs to be elevated at trigger time. This issue has been fixed in version 5.9.23."
    },
    {
      "lang": "es",
      "value": "Craft CMS es un sistema de gestión de contenido (CMS). En las versiones 5.0.0-RC1 hasta la 5.9.22, un usuario del panel de control con nivel de autor puede almacenar una carga útil de JavaScript maliciosa en el título de una entrada. Cuando un administrador, o cualquier usuario del panel de control con permisos ’saveEntries’ para la misma sección de Estructura, arrastra otra entrada debajo de la entrada ’envenenada’ en la vista de tabla, la carga útil se ejecuta en la sesión de la víctima. El problema es explotable porque el título es escapado a ’data-title’ por el servidor, decodificado de nuevo por el navegador, leído con jQuery .data(’title’), y luego concatenado en una nueva cadena HTML sin escape de atributos. Para explotar, un atacante debe tener una cuenta existente en el panel de control (rol de Autor como mínimo), la víctima debe realizar una operación de arrastre (no solo visitar la página), y la sesión de la víctima debe estar elevada en el momento del disparo. Este problema ha sido solucionado en la versión 5.9.23."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "craftcms",
          "product": "cms",
          "versions": [
            {
              "version": ">= 5.0.0-RC1, < 5.9.23",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "LOW",
          "userInteraction": "PASSIVE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-02T15:09:35.733774Z",
          "id": "CVE-2026-55793",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/craftcms/cms/commit/162321e899cc97517fb6f5a02b5528f549d0c6cc",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-xrqc-p465-2xvg",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-xrqc-p465-2xvg",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}