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CVE-2025-47154

Estado: AplazadaCrítica (9)—

LibJS in Ladybird before f5a6704 mishandles the freeing of the vector that arguments_list references, leading to a use-after-free, and allowing remote attackers to execute arbitrary code via a crafted .js file. NOTE: the GitHub README says "Ladybird is in a pre-alpha state, and only suitable for use by developers."

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.

AV:N/AC:H permite T1190 (aplicación web expuesta). Use-after-free en motor JS permite ejecución remota (T1059). Severidad CVSS crítica y acceso a .js sugiere posible escalada (T1068).

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 ManagementExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability Scanning

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Ladybird — LibjsAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-47154",
  "cveTags": [
    {
      "tags": [
        "disputed"
      ],
      "sourceIdentifier": "cve@mitre.org"
    }
  ],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-47154",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-01T14:38:04.914838Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve@mitre.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.2
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "Ladybird",
          "product": "Ladybird",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "f5a670421954fc7130c3685b713c621b29516669",
              "versionType": "git"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-05-01T08:15:17.950",
  "references": [
    {
      "url": "https://github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c621b29516669",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://jessie.cafe/posts/pwning-ladybirds-libjs/",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://news.ycombinator.com/item?id=43852096",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://jessie.cafe/posts/pwning-ladybirds-libjs/",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@mitre.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-820"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "LibJS in Ladybird before f5a6704 mishandles the freeing of the vector that arguments_list references, leading to a use-after-free, and allowing remote attackers to execute arbitrary code via a crafted .js file. NOTE: the GitHub README says \"Ladybird is in a pre-alpha state, and only suitable for use by developers.\""
    },
    {
      "lang": "es",
      "value": "LibJS en Ladybird anterior a f5a6704 gestiona incorrectamente la liberación del vector al que hace referencia arguments_list, lo que provoca un use-after-free y permite a atacantes remotos ejecutar código arbitrario mediante un archivo .js manipulado. NOTA: El README de GitHub indica que «Ladybird se encuentra en estado pre-alfa y solo es apto para desarrolladores»."
    }
  ],
  "lastModified": "2026-06-17T09:27:31.200",
  "sourceIdentifier": "cve@mitre.org"
}