FKIE_CVE-2021-39175

Vulnerability from fkie_nvd - Published: 2021-08-30 21:15 - Updated: 2026-06-17 04:03
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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
HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.
References
security-advisories@github.comhttps://github.com/hedgedoc/hedgedoc/pull/1369Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/hedgedoc/hedgedoc/pull/1375Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/hedgedoc/hedgedoc/pull/1513Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/hedgedoc/hedgedoc/pull/1369Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/hedgedoc/hedgedoc/pull/1375Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/hedgedoc/hedgedoc/pull/1513Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697Patch, Third Party Advisory
Impacted products
Vendor Product Version
hedgedoc hedgedoc *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "hedgedoc",
          "vendor": "hedgedoc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.9.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:hedgedoc:hedgedoc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "81394535-06A5-4A99-A7B6-8A7DB22B56C5",
              "versionEndExcluding": "1.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading."
    },
    {
      "lang": "es",
      "value": "HedgeDoc es una plataforma para escribir y compartir markdown. En versiones anteriores a1.9.0, un atacante no autenticado puede inyectar JavaScript arbitrario en las notas de los oradores de la funci\u00f3n de modo de diapositivas al insertar un iframe que aloje el c\u00f3digo malicioso en las diapositivas o al insertar la instancia de HedgeDoc en otra p\u00e1gina. El problema est\u00e1 parcheado en versi\u00f3n 1.9.0. No se conocen soluciones aparte de la actualizaci\u00f3n."
    }
  ],
  "id": "CVE-2021-39175",
  "lastModified": "2026-06-17T04:03:15.027",
  "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": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "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": "2021-08-30T21:15:09.523",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/pull/1369"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/pull/1375"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/pull/1513"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/pull/1369"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/pull/1375"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/pull/1513"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        },
        {
          "lang": "en",
          "value": "CWE-346"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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