{"id":"GHSA-6g3c-2mh5-7q6x","summary":"Missing validation of JWT signature in `ManyDesigns/Portofino`","details":"### Impact\n[Portofino](https://github.com/ManyDesigns/Portofino) is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens.\nThis allows forging a valid JWT.\n\n### Patches\nThe issue will be patched in the upcoming 5.2.1 release.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [https://github.com/ManyDesigns/Portofino](https://github.com/ManyDesigns/Portofino)","aliases":["CVE-2021-29451"],"modified":"2026-07-08T06:28:50.211772881Z","published":"2021-04-19T14:56:33Z","database_specific":{"cwe_ids":["CWE-347"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2021-04-16T22:57:13Z","nvd_published_at":"2021-04-16T22:15:00Z"},"references":[{"type":"WEB","url":"https://github.com/ManyDesigns/Portofino/security/advisories/GHSA-6g3c-2mh5-7q6x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29451"},{"type":"WEB","url":"https://github.com/ManyDesigns/Portofino/commit/8c754a0ad234555e813dcbf9e57d637f9f23d8fb"},{"type":"WEB","url":"https://mvnrepository.com/artifact/com.manydesigns/portofino"}],"affected":[{"package":{"name":"com.manydesigns:portofino-dispatcher","ecosystem":"Maven","purl":"pkg:maven/com.manydesigns/portofino-dispatcher"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.2.1"}]}],"versions":["5.0.0","5.0.1","5.0.2","5.0.3","5.1.0","5.1.1","5.1.2","5.1.3","5.1.4","5.2.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/04/GHSA-6g3c-2mh5-7q6x/GHSA-6g3c-2mh5-7q6x.json"}},{"package":{"name":"com.manydesigns:portofino-core","ecosystem":"Maven","purl":"pkg:maven/com.manydesigns/portofino-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.2.1"}]}],"versions":["5.0.0","5.0.1","5.0.2","5.0.3","5.1.0","5.1.1","5.1.2","5.1.3","5.1.4","5.2.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/04/GHSA-6g3c-2mh5-7q6x/GHSA-6g3c-2mh5-7q6x.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}