FKIE_CVE-2021-39199

Vulnerability from fkie_nvd - Published: 2021-09-07 19:15 - Updated: 2024-11-21 06:18
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
remark-html is an open source nodejs library which compiles Markdown to HTML. In affected versions the documentation of remark-html has mentioned that it was safe by default. In practice the default was never safe and had to be opted into. That is, user input was not sanitized. This means arbitrary HTML can be passed through leading to potential XSS attacks. The problem has been patched in 13.0.2 and 14.0.1: `remark-html` is now safe by default, and the implementation matches the documentation. On older affected versions, pass `sanitize: true` if you cannot update.
References
security-advisories@github.comhttps://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/remarkjs/remark-html/releases/tag/14.0.1Patch, Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947mPatch, Third Party Advisory
security-advisories@github.comhttps://www.npmjs.com/package/remark-htmlProduct, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/remarkjs/remark-html/releases/tag/14.0.1Patch, Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947mPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.npmjs.com/package/remark-htmlProduct, Third Party Advisory
Impacted products
Vendor Product Version
remark remark-html *
remark remark-html *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "90DE1DEF-8004-44A1-AB3F-8D17332D736D",
              "versionEndExcluding": "13.0.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "DBFC237B-016F-485A-9C0E-3040E1CA4E70",
              "versionEndExcluding": "14.0.1",
              "versionStartIncluding": "14.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "remark-html is an open source nodejs library which compiles Markdown to HTML. In affected versions the documentation of remark-html has mentioned that it was safe by default. In practice the default was never safe and had to be opted into. That is, user input was not sanitized. This means arbitrary HTML can be passed through leading to potential XSS attacks. The problem has been patched in 13.0.2 and 14.0.1: `remark-html` is now safe by default, and the implementation matches the documentation. On older affected versions, pass `sanitize: true` if you cannot update."
    },
    {
      "lang": "es",
      "value": "remark-html es una librer\u00eda nodejs de c\u00f3digo abierto que compila Markdown a HTML. En las versiones afectadas, la documentaci\u00f3n de remark-html mencionaba que era segura por defecto. En la pr\u00e1ctica, nunca fue segura por defecto y hab\u00eda que optar por ella. Es decir, la entrada del usuario no era saneada. Esto significa que se puede pasar  HTML arbitrario, conllevando a potenciales ataques de tipo XSS. El problema ha sido parcheado en las versiones 13.0.2 y 14.0.1: \"remark-html\" es ahora seguro por defecto, y la implementaci\u00f3n coincide con la documentaci\u00f3n. En versiones anteriores afectadas, pase \"sanitize: true\" si no puede actualizar"
    }
  ],
  "id": "CVE-2021-39199",
  "lastModified": "2024-11-21T06:18:52.683",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.8,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-09-07T19:15:08.747",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      ],
      "url": "https://github.com/remarkjs/remark-html/releases/tag/14.0.1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://www.npmjs.com/package/remark-html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      ],
      "url": "https://github.com/remarkjs/remark-html/releases/tag/14.0.1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "url": "https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://www.npmjs.com/package/remark-html"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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