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CVE-2025-8043

Estado: ModificadaCrítica (9.8)—

Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141.

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.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficApplication Isolation and Sandboxing

Tecnologías afectadas (2)

Mozilla — FirefoxMozilla — Thunderbird

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-8043",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-8043",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
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          "version": "2.0.3",
          "timestamp": "2025-07-23T15:05:43.941119Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
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  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
            {
              "status": "unaffected",
              "version": "141",
              "versionType": "rpm",
              "lessThanOrEqual": "*"
            }
          ]
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  ],
  "published": "2025-07-22T21:15:51.263",
  "references": [
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1970209",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "source": "security@mozilla.org"
    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2025-56/",
      "tags": [
        "Vendor Advisory"
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      "source": "security@mozilla.org"
    }
  ],
  "vulnStatus": "Modified",
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  "descriptions": [
    {
      "lang": "en",
      "value": "Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141."
    },
    {
      "lang": "es",
      "value": "Las URL truncadas se enfocan incorrectamente al principio en lugar de alrededor del origen. Esta vulnerabilidad afecta a Firefox (versión anterior a la 141) y Thunderbird (versión anterior a la 141)."
    }
  ],
  "lastModified": "2026-09-30T18:10:00.190",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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