FKIE_CVE-2026-27636

Vulnerability from fkie_nvd - Published: 2026-02-25 04:16 - Updated: 2026-02-26 16:07
Severity ?
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.
References
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009cPatch
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9Not Applicable
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vcExploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9Not Applicable
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vcExploit, Vendor Advisory
Impacted products
Vendor Product Version
freescout freescout *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "79CA8F5D-FF18-4F10-A6AF-3DBED9542088",
              "versionEndExcluding": "1.8.206",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to version 1.8.206, FreeScout\u0027s file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities."
    },
    {
      "lang": "es",
      "value": "FreeScout es un servicio de asistencia t\u00e9cnica gratuito y un buz\u00f3n compartido creado con el marco Laravel de PHP. Antes de la versi\u00f3n 1.8.206, la lista de restricci\u00f3n de carga de archivos de FreeScout en \u0027app/Misc/Helper.php\u0027 no incluye archivos \u0027.htaccess\u0027 o \u0027.user.ini\u0027. En servidores Apache con \u0027AllowOverride All\u0027 (una configuraci\u00f3n com\u00fan), un usuario autenticado puede cargar un archivo \u0027.htaccess\u0027 para redefinir c\u00f3mo se procesan los archivos, habilitando la Ejecuci\u00f3n Remota de C\u00f3digo. Esta vulnerabilidad puede ser explotada por s\u00ed misma o en combinaci\u00f3n con CVE-2026-27637. La versi\u00f3n 1.8.206 corrige ambas vulnerabilidades."
    }
  ],
  "id": "CVE-2026-27636",
  "lastModified": "2026-02-26T16:07:11.047",
  "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"
      }
    ]
  },
  "published": "2026-02-25T04:16:03.933",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009c"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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Sightings

Author Source Type Date

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.