{"id":"CVE-2021-29451","aliases":["EUVD-2021-0773","GHSA-6g3c-2mh5-7q6x"],"status":"published","title":"Missing validation of JWT signature in `ManyDesigns/Portofino`","description":"Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00949,"percentile":0.61459,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-347"],"published":"2021-04-16T21:40:13Z","modified":"2026-10-20T14:02:41Z","fixes":[{"ecosystem":"Maven","package":"com.manydesigns:portofino-dispatcher","fixed_in":["5.2.1"],"sources":["ghsa","osv"]},{"ecosystem":"Maven","package":"com.manydesigns:portofino-core","fixed_in":["5.2.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.manydesigns:portofino-dispatcher","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.2.1"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"com.manydesigns:portofino-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.2.1"}]}]},{"source":"osv","ecosystem":"Maven","package":"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"]},{"source":"osv","ecosystem":"Maven","package":"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"]}],"products":[{"vendor":"manydesigns","product":"portofino"}],"references":[{"url":"https://github.com/ManyDesigns/Portofino/security/advisories/GHSA-6g3c-2mh5-7q6x","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/ManyDesigns/Portofino/commit/8c754a0ad234555e813dcbf9e57d637f9f23d8fb","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://mvnrepository.com/artifact/com.manydesigns/portofino","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29451","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-6g3c-2mh5-7q6x"}],"sources":{"cve":[{"id":"CVE-2021-29451","title":"Missing validation of JWT signature in `ManyDesigns/Portofino`","description":"Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.","status":"published","published":"2021-04-16T21:40:13Z","modified":"2024-08-03T22:02:51.928Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-0773","description":"Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.","status":"published","published":"2021-04-16T21:40:13Z","modified":"2024-08-03T22:02:51Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T03:24:45.541615Z"}],"ghsa":[{"id":"GHSA-6g3c-2mh5-7q6x","title":"Missing validation of JWT signature in `ManyDesigns/Portofino`","description":"### 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)","status":"published","published":"2021-04-19T14:56:33Z","modified":"2023-09-25T16:03:48Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:37:06.234371Z"}],"nvd":[{"id":"CVE-2021-29451","description":"Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.","status":"published","published":"2021-04-16T22:15:14.233Z","modified":"2026-06-17T03:47:40.097Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-29451","description":"Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.","status":"published","published":"2021-04-16T22:15:14.233Z","modified":"2026-10-20T14:02:41.253790306Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"GHSA-6g3c-2mh5-7q6x","title":"Missing validation of JWT signature in `ManyDesigns/Portofino`","description":"### 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)","status":"published","published":"2021-04-19T14:56:33Z","modified":"2026-07-08T06:28:50.211772881Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:46:39.618611Z"}]}}