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CVE-2023-26430

Estado: ModificadaMedia (4.3)—

Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules. This could be abused to access SIEVE extension that are not allowed by App Suite or to inject rules which would break per-user filter processing, requiring manual cleanup of such rules. We have added sanitization to all mail-filter APIs to avoid forwardning control characters to subsystems. No publicly available exploits are known.

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 (1)

Open-xchange — Open-xchange Appsuite Backend

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-26430",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2023-26430",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-10-15T17:09:02.949479Z"
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    "cvssMetricV31": [
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        "source": "security@open-xchange.com",
        "cvssData": {
          "scope": "CHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1.8
      },
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        "cvssData": {
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
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  },
  "affected": [
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      "source": "security@open-xchange.com",
      "affectedData": [
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          "vendor": "OX Software GmbH",
          "modules": [
            "backend"
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          "product": "OX App Suite",
          "versions": [
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              "version": "0",
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  "published": "2023-08-02T13:15:10.217",
  "references": [
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      "url": "http://packetstormsecurity.com/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site-Scripting.html",
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      "tags": [
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@open-xchange.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules. This could be abused to access SIEVE extension that are not allowed by App Suite or to inject rules which would break per-user filter processing, requiring manual cleanup of such rules. We have added sanitization to all mail-filter APIs to avoid forwardning control characters to subsystems. No publicly available exploits are known.\n\n"
    },
    {
      "lang": "es",
      "value": "Los atacantes con acceso a cuentas de usuario pueden inyectar caracteres de control arbitrarios a las reglas del filtro de correo SIEVE. Esto podría ser abusado para acceder a extensiones de SIEVE que no están permitidas por App Suite o para inyectar reglas que romperían el procesamiento de filtros por usuario, requiriendo la limpieza manual de dichas reglas. Se han añadido desinfección a todas las API del filtro de correo para evitar el reenvío de caracteres de control a los subsistemas. No se conocen exploits disponibles públicamente. "
    }
  ],
  "lastModified": "2026-06-17T05:43:19.047",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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