fkie_cve-2025-24981
Vulnerability from fkie_nvd
Published
2025-02-06 18:15
Modified
2025-02-06 18:15
Severity ?
9.3 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Summary
MDC is a tool to take regular Markdown and write documents interacting deeply with a Vue component. In affected versions unsafe parsing logic of the URL from markdown can lead to arbitrary JavaScript code due to a bypass to the existing guards around the `javascript:` protocol scheme in the URL. The parsing logic implement in `props.ts` maintains a deny-list approach to filtering potential malicious payload. It does so by matching protocol schemes like `javascript:` and others. These security guards can be bypassed by an adversarial that provides JavaScript URLs with HTML entities encoded via hex string. Users who consume this library and perform markdown parsing from unvalidated sources could result in rendering vulnerable XSS anchor links. This vulnerability has been addressed in version 0.13.3 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
References
security-advisories@github.comhttps://github.com/nuxt-modules/mdc/blob/main/src/runtime/parser/utils/props.ts#L16
security-advisories@github.comhttps://github.com/nuxt-modules/mdc/commit/99097738b5561639e9bf247c55d8103236618bf3
security-advisories@github.comhttps://github.com/nuxt-modules/mdc/security/advisories/GHSA-j82m-pc2v-2484
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MDC is a tool to take regular Markdown and write documents interacting deeply with a Vue component. In affected versions unsafe parsing logic of the URL from markdown can lead to arbitrary JavaScript code due to a bypass to the existing guards around the `javascript:` protocol scheme in the URL. The parsing logic implement in `props.ts` maintains a deny-list approach to filtering potential malicious payload. It does so by matching protocol schemes like `javascript:` and others. These security guards can be bypassed by an adversarial that provides JavaScript URLs with HTML entities encoded via hex string. Users who consume this library and perform markdown parsing from unvalidated sources could result in rendering vulnerable XSS anchor links. This vulnerability has been addressed in version 0.13.3 and all users are advised to upgrade. There are no known workarounds for this vulnerability."
    },
    {
      "lang": "es",
      "value": "MDC es una herramienta para tomar Markdown regular y escribir documentos que interact\u00faan profundamente con un componente Vue. En las versiones afectadas, la l\u00f3gica de an\u00e1lisis insegura de la URL de Markdown puede generar c\u00f3digo JavaScript arbitrario debido a una omisi\u00f3n de las protecciones existentes en torno al esquema de protocolo `javascript:` en la URL. La l\u00f3gica de an\u00e1lisis implementada en `props.ts` mantiene un enfoque de lista de denegaci\u00f3n para filtrar el payload malicioso potencial. Lo hace al hacer coincidir esquemas de protocolo como `javascript:` y otros. Estas protecciones de seguridad pueden ser omitidas por un adversario que proporcione URL de JavaScript con entidades HTML codificadas a trav\u00e9s de una cadena hexadecimal. Los usuarios que consumen esta librer\u00eda y realizan an\u00e1lisis de Markdown desde fuentes no validadas podr\u00edan generar enlaces de anclaje XSS vulnerables. Esta vulnerabilidad se ha solucionado en la versi\u00f3n 0.13.3 y se recomienda a todos los usuarios que actualicen. No existen workarounds para esta vulnerabilidad."
    }
  ],
  "id": "CVE-2025-24981",
  "lastModified": "2025-02-06T18:15:32.847",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-02-06T18:15:32.847",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nuxt-modules/mdc/blob/main/src/runtime/parser/utils/props.ts#L16"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nuxt-modules/mdc/commit/99097738b5561639e9bf247c55d8103236618bf3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nuxt-modules/mdc/security/advisories/GHSA-j82m-pc2v-2484"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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