{
  "id": "CVE-2021-20835",
  "sourceIdentifier": "vultures@jpcert.or.jp",
  "published": "2021-11-24T16:15:12.970",
  "lastModified": "2022-05-03T16:04:40.443",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper authorization in handler for custom URL scheme vulnerability in Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) versions prior to 4.49.1 allows a remote attacker to lead a user to access an arbitrary website and the website launches an arbitrary Activity of the app via the vulnerable App, which may result in Mercari account's access token being obtained."
    },
    {
      "lang": "es",
      "value": "Una autorizaci\u00f3n inapropiada en el manejador para la vulnerabilidad del esquema de URL personalizado en la aplicaci\u00f3n Android \"Mercari (Merpay) - Marketplace and Mobile Payments App\" (versi\u00f3n de Jap\u00f3n) versiones anteriores a la 4.49.1, permite a un atacante remoto conllevar a un usuario a acceder a un sitio web arbitrario y el sitio web lanza una actividad arbitraria de la aplicaci\u00f3n por medio de la aplicaci\u00f3n vulnerable, lo que puede resultar en una obtenci\u00f3n del token de acceso de la cuenta Mercari"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "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:mercari:mercari:*:*:*:*:*:android:*:*",
              "versionEndExcluding": "4.49.1",
              "matchCriteriaId": "AD3E0EAD-AADA-4EFF-9663-CD638377A02F"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN49465877/index.html",
      "source": "vultures@jpcert.or.jp",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}