{"id":"CVE-2021-29451","aliases":["GHSA-6g3c-2mh5-7q6x"],"url":"https://o3.security/vulnerability/CVE-2021-29451","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)","published":"2021-04-16T22:15:14.233Z","modified":"2026-07-09T10:52:30.887855Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"com.manydesigns:portofino-dispatcher","fixedVersion":"5.2.1"},{"ecosystem":"Maven","name":"com.manydesigns:portofino-core","fixedVersion":"5.2.1"}],"fix":{"url":"https://github.com/ManyDesigns/Portofino/commit/8c754a0ad234555e813dcbf9e57d637f9f23d8fb","label":"ManyDesigns/Portofino@8c754a0"},"references":[{"type":"ADVISORY","url":"https://github.com/ManyDesigns/Portofino/security/advisories/GHSA-6g3c-2mh5-7q6x"},{"type":"ADVISORY","url":"https://mvnrepository.com/artifact/com.manydesigns/portofino"},{"type":"FIX","url":"https://github.com/ManyDesigns/Portofino/commit/8c754a0ad234555e813dcbf9e57d637f9f23d8fb"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29451"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T10:52:30.887855Z"}}