CVE-2026-53599

{
  "id": "CVE-2026-53599",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-31T20:16:51.847",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1."
    },
    {
      "lang": "es",
      "value": "REDAXO es un sistema de gestión de contenido basado en PHP. Desde la versión 5.18.2 hasta la 5.21.1, rex_mediapool::isAllowedExtension en redaxo/src/addons/mediapool/lib/mediapool.php permite a un usuario de backend autenticado con permiso media[upload] subir un políglota JPEG/PHP llamado shell.php.any.jpg, que los servidores web con manejadores PHP de múltiples extensiones pueden ejecutar como el usuario del servidor web. Este problema está solucionado en la versión 5.21.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "redaxo",
          "product": "core",
          "versions": [
            {
              "version": ">= 5.18.2, < 5.21.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-31T20:11:41.826930Z",
          "id": "CVE-2026-53599",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/redaxo/core/commit/462e36896bb65d292ba22d711044c23c9cfb0340",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/redaxo/core/pull/6538",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/redaxo/core/releases/tag/5.21.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}