FKIE_CVE-2021-20813

Vulnerability from fkie_nvd - Published: 2021-08-26 02:15 - Updated: 2026-06-17 03:34
Severity
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
Cross-site scripting vulnerability in Edit screen of Content Data of Movable Type (Movable Type 7 r.4903 and earlier (Movable Type 7 Series) and Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.
References
vultures@jpcert.or.jphttps://jvn.jp/en/jp/JVN97545738/index.htmlThird Party Advisory
vultures@jpcert.or.jphttps://movabletype.org/news/2021/08/mt-780-681-released.htmlRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://jvn.jp/en/jp/JVN97545738/index.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://movabletype.org/news/2021/08/mt-780-681-released.htmlRelease Notes, Vendor Advisory
Impacted products
Vendor Product Version
sixapart movable_type *
sixapart movable_type *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Movable Type",
          "vendor": "Six Apart Ltd.",
          "versions": [
            {
              "status": "affected",
              "version": "Movable Type 7 r.4903 and earlier (Movable Type 7 Series) and Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)"
            }
          ]
        }
      ],
      "source": "vultures@jpcert.or.jp"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:*",
              "matchCriteriaId": "D37106C9-92CD-44A8-A80B-57754207AE80",
              "versionEndExcluding": "7.8.0",
              "versionStartIncluding": "7.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:*",
              "matchCriteriaId": "5CA5A16F-B42D-4DC7-B9A0-5CA49B05DA7B",
              "versionEndExcluding": "7.8.0",
              "versionStartIncluding": "7.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cross-site scripting vulnerability in Edit screen of Content Data of Movable Type (Movable Type 7 r.4903 and earlier (Movable Type 7 Series) and Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series)) allows remote attackers to inject arbitrary script or HTML via unspecified vectors."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de tipo cross-site scripting en la pantalla Edit de Content Data de Movable Type (Movable Type 7 versiones r.4903 y anteriores (Movable Type 7 Series) y Movable Type Advanced 7 versiones r.4903 y anteriores (Movable Type Advanced 7 Series)), permite a atacantes remotos inyectar script arbitrario o HTML por medio de vectores no especificados."
    }
  ],
  "id": "CVE-2021-20813",
  "lastModified": "2026-06-17T03:34:29.677",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-08-26T02:15:11.657",
  "references": [
    {
      "source": "vultures@jpcert.or.jp",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://jvn.jp/en/jp/JVN97545738/index.html"
    },
    {
      "source": "vultures@jpcert.or.jp",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://movabletype.org/news/2021/08/mt-780-681-released.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://jvn.jp/en/jp/JVN97545738/index.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://movabletype.org/news/2021/08/mt-780-681-released.html"
    }
  ],
  "sourceIdentifier": "vultures@jpcert.or.jp",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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