{"id":"CVE-2021-29455","state":"PUBLISHED","title":"Missing validation of JWT signature in `grassrootza/grassroot-platform`","description":"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).","publishedAt":"2021-04-19T19:05:15.000Z","updatedAt":"2024-08-03T22:02:51.935Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["grassrootza grassroot-platform"],"affected":[{"vendor":"grassrootza","product":"grassroot-platform","versions":[{"version":"< 1.3.1","status":"affected"}]}],"references":["https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734","https://github.com/grassrootza/grassroot-platform/","https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f"],"weaknesses":["CWE-347"],"ingestedAt":"2026-10-29T19:48:21.578Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/29xxx/CVE-2021-29455.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-29455","state":"PUBLISHED","datePublished":"2021-04-19T19:05:15.000Z","dateUpdated":"2024-08-03T22:02:51.935Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2021-03-30T00:00:00.000Z"},"containers":{"cna":{"title":"Missing validation of JWT signature in `grassrootza/grassroot-platform`","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)."}],"affected":[{"vendor":"grassrootza","product":"grassroot-platform","versions":[{"version":"< 1.3.1","status":"affected"}]}],"references":[{"url":"https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/grassrootza/grassroot-platform/","tags":["x_refsource_MISC"]},{"url":"https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f","tags":["x_refsource_MISC"]}],"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":{"shortName":"GitHub_M","dateUpdated":"2021-04-19T19:05:15.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-f65w-6xw8-6734","discovery":"UNKNOWN"},"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":[{"title":"CVE Program Container","references":[{"url":"https://github.com/grassrootza/grassroot-platform/security/advisories/GHSA-f65w-6xw8-6734","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/grassrootza/grassroot-platform/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/grassrootza/grassroot-platform/commit/a2e6e885f8183a066d938cf909fd813a7af7d67f","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T22:02:51.935Z"}}]}}}