{
  "id": "CVE-2021-35955",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-08-12T15:15:07.960",
  "lastModified": "2021-08-20T19:51:40.223",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Contao >=4.0.0 allows backend XSS via HTML attributes to an HTML field. Fixed in 4.4.56, 4.9.18, 4.11.7."
    },
    {
      "lang": "es",
      "value": "Contao versiones posteriores a 4.0.0 incluy\u00e9ndola, permite un ataque de tipo XSS de backend por medio de atributos HTML a un campo HTML. Corregido en versiones 4.4.56, 4.9.18, 4.11.7"
    }
  ],
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        "type": "Primary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 1.7,
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    ],
    "cvssMetricV2": [
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        "source": "nvd@nist.gov",
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          "authentication": "SINGLE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 3.5
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        "exploitabilityScore": 6.8,
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        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
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  "configurations": [
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      "nodes": [
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          "operator": "OR",
          "negate": false,
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  "references": [
    {
      "url": "https://contao.org/en/news/contao-4-9-16-and-4-11-5-are-available.html",
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ]
    },
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      "url": "https://github.com/contao/contao/security/advisories/GHSA-hr3h-x6gq-rqcp",
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}