CVE-2021-29455

{"containers": {"cna": {"affected": [{"product": "grassroot-platform", "vendor": "grassrootza", "versions": [{"status": "affected", "version": "< 1.3.1"}]}], "descriptions": [{"lang": "en", "value": "Grassroot Platform is an application to make it faster, cheaper and easier to persistently organize and mobilize people in low-income communities. Grassroot Platform before master deployment as of 2021-04-16 did not properly verify the signature of JSON Web Tokens when refreshing an existing JWT. This allows to forge a valid JWT. The problem has been patched in version 1.3.1 by deprecating the JWT refresh function, which was an overdue deprecation regardless (the \"refresh\" flow is no longer used)."}], "metrics": [{"cvssV3_1": {"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"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-347", "description": "{\"CWE-347\":\"Improper Verification of Cryptographic Signature\"}", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-04-19T19:05:15.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/grassrootza/grassroot-platform/"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f"}], "source": {"advisory": "GHSA-f65w-6xw8-6734", "discovery": "UNKNOWN"}, "title": "Missing validation of JWT signature in `grassrootza/grassroot-platform`", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-29455", "STATE": "PUBLIC", "TITLE": "Missing validation of JWT signature in `grassrootza/grassroot-platform`"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "grassroot-platform", "version": {"version_data": [{"version_value": "< 1.3.1"}]}}]}, "vendor_name": "grassrootza"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Grassroot Platform is an application to make it faster, cheaper and easier to persistently organize and mobilize people in low-income communities. Grassroot Platform before master deployment as of 2021-04-16 did not properly verify the signature of JSON Web Tokens when refreshing an existing JWT. This allows to forge a valid JWT. The problem has been patched in version 1.3.1 by deprecating the JWT refresh function, which was an overdue deprecation regardless (the \"refresh\" flow is no longer used)."}]}, "impact": {"cvss": {"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"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "{\"CWE-347\":\"Improper Verification of Cryptographic Signature\"}"}]}]}, "references": {"reference_data": [{"name": "https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734", "refsource": "CONFIRM", "url": "https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734"}, {"name": "https://github.com/grassrootza/grassroot-platform/", "refsource": "MISC", "url": "https://github.com/grassrootza/grassroot-platform/"}, {"name": "https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f", "refsource": "MISC", "url": "https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f"}]}, "source": {"advisory": "GHSA-f65w-6xw8-6734", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:02:51.935Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/grassrootza/grassroot-platform/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-29455", "datePublished": "2021-04-19T19:05:15.000Z", "dateReserved": "2021-03-30T00:00:00.000Z", "dateUpdated": "2024-08-03T22:02:51.935Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "grassroot-platform", "vendor": "grassrootza", "versions": [{"status": "affected", "version": "< 1.3.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:grassroot:grassroot_platform:*:*:*:*:*:*:*:*", "matchCriteriaId": "945F532A-7668-4C8E-9599-240FCEC2862B", "versionEndExcluding": "1.3.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Grassroot Platform is an application to make it faster, cheaper and easier to persistently organize and mobilize people in low-income communities. Grassroot Platform before master deployment as of 2021-04-16 did not properly verify the signature of JSON Web Tokens when refreshing an existing JWT. This allows to forge a valid JWT. The problem has been patched in version 1.3.1 by deprecating the JWT refresh function, which was an overdue deprecation regardless (the \"refresh\" flow is no longer used)."}, {"lang": "es", "value": "Grassroot Platform es una aplicaci\u00f3n que hace que sea m\u00e1s r\u00e1pido, m\u00e1s barato y m\u00e1s f\u00e1cil organizar y movilizar persistentemente a las personas en comunidades de bajos ingresos.&#xa0;Grassroot Platform versiones anteriores a la implementaci\u00f3n maestra a partir del 16-04-2021, no comprobaba apropiadamente la firma de JSON Web Tokens al actualizar un JWT existente.&#xa0;Esto permite falsificar un JWT v\u00e1lido.&#xa0;El problema ha sido parcheado en versi\u00f3n 1.3.1, al desaprobar la funci\u00f3n de actualizaci\u00f3n de JWT, que era una desaprobaci\u00f3n vencida independientemente (el flujo de \"refresh\" ya no es usado)"}], "id": "CVE-2021-29455", "lastModified": "2026-06-17T03:47:40.590", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/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": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-04-19T19:15:17.827", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Third Party Advisory"], "url": "https://github.com/grassrootza/grassroot-platform/"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Third Party Advisory"], "url": "https://github.com/grassrootza/grassroot-platform/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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