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CVE-2021-32862

Estado: ModificadaMedia (5.4)—

The GitHub Security Lab discovered sixteen ways to exploit a cross-site scripting vulnerability in nbconvert. When using nbconvert to generate an HTML version of a user-controllable notebook, it is possible to inject arbitrary HTML which may lead to cross-site scripting (XSS) vulnerabilities if these HTML notebooks are served by a web server (eg: nbviewer).

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 (2)

Debian — Debian LinuxJupyter — Nbconvert

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-32862",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.6
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "jupyter",
          "product": "nbconvert",
          "versions": [
            {
              "status": "affected",
              "version": "<= 6.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-08-18T19:15:14.337",
  "references": [
    {
      "url": "https://github.com/jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/jupyter/nbviewer/security/advisories/GHSA-h274-fcvj-h2wm",
      "tags": [
        "Broken Link"
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    },
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      "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html",
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        "Third Party Advisory"
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    {
      "url": "https://github.com/jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/jupyter/nbviewer/security/advisories/GHSA-h274-fcvj-h2wm",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00004.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The GitHub Security Lab discovered sixteen ways to exploit a cross-site scripting vulnerability in nbconvert. When using nbconvert to generate an HTML version of a user-controllable notebook, it is possible to inject arbitrary HTML which may lead to cross-site scripting (XSS) vulnerabilities if these HTML notebooks are served by a web server (eg: nbviewer)."
    },
    {
      "lang": "es",
      "value": "GitHub Security Lab detectó dieciséis formas de explotar una vulnerabilidad de tipo cross-site scripting en nbconvert. Cuando es usado nbconvert para generar una versión HTML de un cuaderno controlable por el usuario, es posible inyectar HTML arbitrario que puede conllevar a vulnerabilidades de tipo cross-site scripting (XSS) si estos cuadernos HTML son servidos por un servidor web (por ejemplo: nbviewer)."
    }
  ],
  "lastModified": "2026-06-17T03:53:46.860",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:jupyter:nbconvert:*:*:*:*:*:python:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9435F75B-A4F7-483E-BB77-312C5AE7BD31",
              "versionEndIncluding": "6.2.0"
            }
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          "operator": "OR"
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    },
    {
      "nodes": [
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            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "security-advisories@github.com"
}