{
  "id": "CVE-2021-20777",
  "sourceIdentifier": "vultures@jpcert.or.jp",
  "published": "2021-07-07T08:15:07.887",
  "lastModified": "2022-05-03T16:04:40.443",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper authorization in handler for custom URL scheme vulnerability in GU App for Android versions from 4.8.0 to 5.0.2 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de autorizaci\u00f3n inapropiada en el manejador de esquemas de URL personalizados en la aplicaci\u00f3n GU para Android en versiones desde 4.8.0 hasta 5.0.2, permite a un atacante remoto conllevar a un usuario a acceder a un sitio web arbitrario por medio de la aplicaci\u00f3n vulnerable"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.3
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gu-global:gu:*:*:*:*:*:android:*:*",
              "versionStartIncluding": "4.8.0",
              "versionEndIncluding": "5.0.2",
              "matchCriteriaId": "67D88110-A5F1-41E0-BB3A-5BC4DF808022"
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  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN25850723/index.html",
      "source": "vultures@jpcert.or.jp",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}