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CVE-2021-43818

Estado: ModificadaAlta (7.1)—

lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.

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 (11)

Debian — Debian LinuxFedoraproject — FedoraLxml — LxmlNetapp — HCI Storage Node FirmwareNetapp — SolidfireNetapp — Solidfire Enterprise SDSOracle — Communications Cloud Native Core Binding Support FunctionOracle — Communications Cloud Native Core Network Exposure FunctionOracle — Communications Cloud Native Core PolicyOracle — Http ServerOracle — ZFS Storage Appliance KIT

CWE

Referencias

JSON original (NVD)

Mostrar
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      "description": [
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          "lang": "en",
          "value": "CWE-74"
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        {
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          "value": "CWE-79"
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      "source": "nvd@nist.gov",
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          "value": "CWE-79"
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      "value": "lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available."
    },
    {
      "lang": "es",
      "value": "lxml es una biblioteca para procesar XML y HTML en el lenguaje Python. En versiones anteriores a 4.6.5, el limpiador de HTML en lxml.html dejaba pasar determinado contenido de scripts manipulados, así como contenido de scripts en archivos SVG insertados usando URIs de datos. Los usuarios que empleen el limpiador de HTML en un contexto relevante para la seguridad deben actualizar a lxml versión 4.6.5 para recibir un parche. No se presentan soluciones conocidas disponibles"
    }
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  "lastModified": "2026-06-17T04:11:30.140",
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