CVE-2021-20835

{"containers": {"cna": {"affected": [{"product": "Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version)", "vendor": "Mercari, Inc.", "versions": [{"status": "affected", "version": "versions prior to 4.49.1"}]}], "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."}], "problemTypes": [{"descriptions": [{"description": "Improper Authorization in Handler for Custom URL Scheme", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-11-24T08:25:38.000Z", "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "shortName": "jpcert"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://jvn.jp/en/jp/JVN49465877/index.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "vultures@jpcert.or.jp", "ID": "CVE-2021-20835", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version)", "version": {"version_data": [{"version_value": "versions prior to 4.49.1"}]}}]}, "vendor_name": "Mercari, Inc."}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Improper Authorization in Handler for Custom URL Scheme"}]}]}, "references": {"reference_data": [{"name": "https://jvn.jp/en/jp/JVN49465877/index.html", "refsource": "MISC", "url": "https://jvn.jp/en/jp/JVN49465877/index.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:53:23.012Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://jvn.jp/en/jp/JVN49465877/index.html"}]}]}, "cveMetadata": {"assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "assignerShortName": "jpcert", "cveId": "CVE-2021-20835", "datePublished": "2021-11-24T08:25:38.000Z", "dateReserved": "2020-12-17T00:00:00.000Z", "dateUpdated": "2024-08-03T17:53:23.012Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version)", "vendor": "Mercari, Inc.", "versions": [{"status": "affected", "version": "versions prior to 4.49.1"}]}], "source": "vultures@jpcert.or.jp"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mercari:mercari:*:*:*:*:*:android:*:*", "matchCriteriaId": "AD3E0EAD-AADA-4EFF-9663-CD638377A02F", "versionEndExcluding": "4.49.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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"}], "id": "CVE-2021-20835", "lastModified": "2026-06-17T03:34:30.887", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-24T16:15:12.970", "references": [{"source": "vultures@jpcert.or.jp", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN49465877/index.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN49465877/index.html"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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