{
  "id": "CVE-2021-26271",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-01-26T21:15:12.860",
  "lastModified": "2021-12-01T16:16:59.177",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted text into the Styles input of specific dialogs (in the Advanced Tab for Dialogs plugin)."
    },
    {
      "lang": "es",
      "value": "Era posible ejecutar un ataque de tipo ReDoS dentro de CKEditor 4 versiones anteriores a 4.16, al persuadir a una v\u00edctima para pegar un texto dise\u00f1ado en la entrada Styles de cuadros de di\u00e1logo espec\u00edficos (en la pesta\u00f1a Advanced para el plugin Dialogs)"
    }
  ],
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        "type": "Primary",
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          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
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          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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  "weaknesses": [
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      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-829"
        }
      ]
    }
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  "references": [
    {
      "url": "https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first",
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416",
      "source": "cve@mitre.org",
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      "source": "cve@mitre.org",
      "tags": [
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    },
    {
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    }
  ]
}