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CVE-2023-51646

Status: AnalyzedMedium (4.7)—

Allegra uploadSimpleFile Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the uploadSimpleFile method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-22527.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2023-51646",
  "cveTags": [],
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          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2024-11-25T16:30:30.569642Z"
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  "published": "2024-11-22T20:15:07.230",
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      "tags": [
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      "url": "https://www.zerodayinitiative.com/advisories/ZDI-24-109/",
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      "description": [
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          "value": "CWE-22"
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      "value": "Allegra uploadSimpleFile Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.\n\nThe specific flaw exists within the uploadSimpleFile method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-22527."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de ejecución remota de código en el directorio uploadSimpleFile de Allegra. Esta vulnerabilidad permite a atacantes remotos ejecutar código arbitrario en las instalaciones afectadas de Allegra. Aunque se requiere autenticación para explotar esta vulnerabilidad, se puede omitir el mecanismo de autenticación existente. La falla específica existe dentro del método uploadSimpleFile. El problema es el resultado de la falta de validación adecuada de una ruta proporcionada por el usuario antes de usarla en operaciones de archivo. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto de SERVICIO LOCAL. Era ZDI-CAN-22527."
    }
  ],
  "lastModified": "2026-06-17T06:41:23.640",
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