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CVE-2020-8866

Estado: ModificadaMedia (6.5)—

This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22. Authentication is required to exploit this vulnerability. The specific flaw exists within add.php. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the www-data user. Was ZDI-CAN-10125.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Debian — Debian LinuxHorde — GroupwareHorde — Horde Form

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-8866",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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          "integrityImpact": "HIGH",
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          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
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          "confidentialityImpact": "NONE"
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        "exploitabilityScore": 2.8
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  "affected": [
    {
      "source": "zdi-disclosures@trendmicro.com",
      "affectedData": [
        {
          "vendor": "Horde",
          "product": "Groupware Webmail Edition",
          "versions": [
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              "version": "5.2.22"
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  ],
  "published": "2020-03-23T21:15:12.643",
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        "Third Party Advisory"
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "zdi-disclosures@trendmicro.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22. Authentication is required to exploit this vulnerability. The specific flaw exists within add.php. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the www-data user. Was ZDI-CAN-10125."
    },
    {
      "lang": "es",
      "value": "Esta vulnerabilidad permite a atacantes remotos crear archivos arbitrarios sobre las instalaciones afectadas de Horde Groupware Webmail Edition versión 5.2.22. Es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del archivo add.php. El problema es debido a la falta de una comprobación apropiada de los datos suministrados por el usuario, lo que puede permitir la carga de archivos arbitrarios. Un atacante puede aprovechar esto en conjunto con otras vulnerabilidades para ejecutar código en el contexto del usuario www-data. Fue ZDI-CAN-10125."
    }
  ],
  "lastModified": "2026-06-17T03:27:05.693",
  "configurations": [
    {
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        {
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  "sourceIdentifier": "zdi-disclosures@trendmicro.com"
}