{
  "affected": [
    {
      "affectedData": [
        {
          "product": "freescout",
          "vendor": "freescout-help-desk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.8.224"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to version 1.8.224, the denylist that neutralizes dangerous file uploads (`Helper::$restricted_extensions`) is incomplete: it does not cover the `.pht` extension. The authenticated upload endpoint `POST /uploads/upload` (`SecureController@upload`) stores files with their original extension into the web-accessible directory `storage/app/public/uploads/` (served at `/storage/uploads/`). On the standard Apache + `libapache2-mod-php` deployment, the default handler `\u003cFilesMatch \".+\\.ph(ar|p[3457]?|t|tml)$\"\u003e` executes `.pht`, so **any authenticated agent can upload a `.pht` web shell and run arbitrary commands as the web-server user** (`www-data`). This is a direct bypass of the fix for CVE-2025-48471, which added `phtml`/`phar` but not `pht` (nor `phtm`, `phps`). Version 1.8.224 contains an updated fix."
    },
    {
      "lang": "es",
      "value": "FreeScout es una mesa de ayuda y bandeja de entrada compartida gratuita construida con el framework Laravel de PHP. Antes de la versi\u00f3n 1.8.224, la lista de denegaci\u00f3n que neutraliza las cargas de archivos peligrosos (\u2019Helper::$restricted_extensions\u2019) est\u00e1 incompleta: no cubre la extensi\u00f3n \u2019.pht\u2019. El endpoint de carga autenticado \u2019POST /uploads/upload\u2019 (\u2019SecureController@upload\u2019) almacena archivos con su extensi\u00f3n original en el directorio accesible por la web \u2019storage/app/public/uploads/\u2019 (servido en \u2019/storage/uploads/\u2019). En la implementaci\u00f3n est\u00e1ndar de Apache + \u2019libapache2-mod-php\u2019, el gestor predeterminado \u201c\u003cFilesMatch \u201c.+\\.ph(ar|p[3457]?|t|tml)$\u201d\u003e\u201d ejecuta \u2019.pht\u2019, por lo que cualquier agente autenticado puede cargar un web shell \u2019.pht\u2019 y ejecutar comandos arbitrarios como el usuario del servidor web (\u2019www-data\u2019). Esto es un bypass directo de la correcci\u00f3n para CVE-2025-48471, que a\u00f1adi\u00f3 \u2019phtml\u2019/\u2019phar\u2019 pero no \u2019pht\u2019 (ni \u2019phtm\u2019, \u2019phps\u2019). La versi\u00f3n 1.8.224 contiene una correcci\u00f3n actualizada."
    }
  ],
  "id": "CVE-2026-53593",
  "lastModified": "2026-10-24T20:10:00.137",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-53593",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-21T13:21:02.831385Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-20T20:16:44.883",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-27vp-fpg8-j8wv"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-27vp-fpg8-j8wv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}