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CVE-2018-25110

Estado: AnalizadaMedia (6.9)—

Marked prior to version 0.3.17 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to catastrophic backtracking in several regular expressions used for parsing HTML tags and markdown links. An attacker can exploit this vulnerability by providing specially crafted markdown input, such as deeply nested or repetitively structured brackets or tag attributes, which cause the parser to hang and lead to a Denial of Service.

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 (1)

Marked Project — Marked

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2018-25110",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2018-25110",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-23T15:09:00.284859Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 6.9,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
      "affectedData": [
        {
          "repo": "https://github.com/markedjs/marked",
          "versions": [
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              "version": "0",
              "lessThan": "0.3.17",
              "versionType": "custom"
            }
          ],
          "packageName": "marked",
          "collectionURL": "https://registry.npmjs.org",
          "defaultStatus": "unaffected"
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  ],
  "published": "2025-05-23T15:15:20.210",
  "references": [
    {
      "url": "https://github.com/Checkmarx/Vulnerabilities-Proofs-of-Concept/tree/main/2018/CVE-2018-25110",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"
    },
    {
      "url": "https://github.com/markedjs/marked/commit/20bfc106013ed45713a21672ad4a34df94dcd485",
      "tags": [
        "Patch"
      ],
      "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"
    },
    {
      "url": "https://github.com/markedjs/marked/issues/1070",
      "tags": [
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        "Third Party Advisory"
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      "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"
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      "url": "https://github.com/markedjs/marked/pull/1083",
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        "Patch"
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      "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Marked prior to version 0.3.17 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to catastrophic backtracking in several regular expressions used for parsing HTML tags and markdown links. An attacker can exploit this vulnerability by providing specially crafted markdown input, such as deeply nested or repetitively structured brackets or tag attributes, which cause the parser to hang and lead to a Denial of Service."
    },
    {
      "lang": "es",
      "value": "Marked antes de la versión 0.3.17 es vulnerable a un ataque de denegación de servicio de expresiones regulares (ReDoS) debido a un retroceso catastrófico en varias expresiones regulares utilizadas para analizar etiquetas HTML y enlaces de Markdown. Un atacante puede explotar esta vulnerabilidad proporcionando una entrada de Markdown especialmente manipulada, como corchetes o atributos de etiqueta profundamente anidados o con estructura repetitiva, que provocan el bloqueo del analizador y provocan una denegación de servicio."
    }
  ],
  "lastModified": "2026-06-17T01:54:44.457",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:marked_project:marked:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4856B465-D23C-4A3B-A935-CD519B8B2A09",
              "versionEndExcluding": "0.3.17"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "596c5446-0ce5-4ba2-aa66-48b3b757a647"
}