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CVE-2025-24855

Estado: ModificadaAlta (7.8)—

numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath context node can be modified but never restored. This is related to xsltNumberFormatGetValue, xsltEvalXPathPredicate, xsltEvalXPathStringNs, and xsltComputeSortResultInternal.

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:L + PR:L sin interacción (UI:N) indica escalada de privilegios local (T1068). Use-after-free en libxslt permite ejecución de código (T1059) con máximos permisos en el contexto de la aplicación.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Xmlsoft — Libxslt

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-24855",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-24855",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-08-02T03:55:44.994172Z"
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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              "version": "0",
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  "published": "2025-03-14T02:15:15.717",
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      "url": "https://gitlab.gnome.org/GNOME/libxslt/-/issues/128",
      "tags": [
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      "source": "cve@mitre.org"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00015.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "cve@mitre.org",
      "description": [
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          "value": "CWE-416"
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      "lang": "en",
      "value": "numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath context node can be modified but never restored. This is related to xsltNumberFormatGetValue, xsltEvalXPathPredicate, xsltEvalXPathStringNs, and xsltComputeSortResultInternal."
    },
    {
      "lang": "es",
      "value": "numbers.c en libxslt anterior a la versión 1.1.43 tiene un método de uso después de la liberación porque, en evaluaciones XPath anidadas, un nodo de contexto XPath puede modificarse, pero nunca restaurarse. Esto está relacionado con xsltNumberFormatGetValue, xsltEvalXPathPredicate, xsltEvalXPathStringNs y xsltComputeSortResultInternal."
    }
  ],
  "lastModified": "2026-06-17T08:59:44.487",
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    {
      "nodes": [
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          "negate": false,
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  "sourceIdentifier": "cve@mitre.org"
}