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CVE-2025-3875

Estado: ModificadaAlta (7.5)—

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an (invalid) value "Spoofed Name ", Thunderbird treats spoofed@example.com as the actual address. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad remota de análisis de direcciones (CWE-290) en cliente de correo que permite suplantación de remitente sin autenticación. Suplantación de identidad (T1078) para engaño o phishing.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (1)

Mozilla — Thunderbird

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-3875",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2025-3875",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
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            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-05-15T14:52:16.337372Z"
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          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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      "tags": [
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      "source": "security@mozilla.org"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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  "descriptions": [
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      "lang": "en",
      "value": "Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an (invalid) value \"Spoofed Name  \", Thunderbird treats spoofed@example.com as the actual address. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1."
    },
    {
      "lang": "es",
      "value": "Thunderbird analiza las direcciones de forma que puede permite la suplantación del remitente si el servidor permite el uso de una dirección de remitente no válida. Por ejemplo, si el encabezado \"De\" contiene el valor (inválido) \"Nombre falsificado\", Thunderbird trata spoofed@example.com como la dirección real. Esta vulnerabilidad afecta a Thunderbird < 128.10.1 y Thunderbird < 138.0.1."
    }
  ],
  "lastModified": "2026-06-17T09:20:50.703",
  "configurations": [
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