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CVE-2021-26272

Estado: ModificadaMedia (6.5)—

It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).

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 (10)

Ckeditor — CkeditorOracle — Agile Product Lifecycle ManagementOracle — Application ExpressOracle — Banking Party ManagementOracle — Commerce MerchandisingOracle — Financial Services Analytical Applications InfrastructureOracle — Financial Services Model Management AND GovernanceOracle — JD Edwards Enterpriseone ToolsOracle — Siebel UI FrameworkOracle — Webcenter Sites

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-26272",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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    "cvssMetricV31": [
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
          "product": "n/a",
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  "published": "2021-01-26T21:15:12.923",
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      "url": "https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ]
    }
  ],
  "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 URL-like text into the editor, and then press Enter or Space (in the Autolink 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 víctima para pegar un texto similar a una URL en el editor y luego presionar Enter o Space  (en el plugin Autolink)"
    }
  ],
  "lastModified": "2026-08-25T16:28:27.310",
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}