{"id":"CVE-2021-29624","details":"fastify-csrf is an open-source plugin helps developers protect their Fastify server against CSRF attacks. Versions of fastify-csrf prior to 3.1.0 have a \"double submit\" mechanism using cookies with an application deployed across multiple subdomains, e.g. \"heroku\"-style platform as a service. Version 3.1.0 of the fastify-csrf fixes it. the vulnerability. The user of the module would need to supply a `userInfo` when generating the CSRF token to fully implement the protection on their end. This is needed only for applications hosted on different subdomains.","aliases":["GHSA-rc4q-9m69-gqp8"],"modified":"2026-03-15T22:40:16.491801Z","published":"2021-05-19T22:15:07.837Z","related":["GHSA-rc4q-9m69-gqp8"],"references":[{"type":"ADVISORY","url":"https://github.com/fastify/fastify-csrf/releases/tag/v3.1.0"},{"type":"ADVISORY","url":"https://owasp.org/www-pdf-archive/David_Johansson-Double_Defeat_of_Double-Submit_Cookie.pdf"},{"type":"ADVISORY","url":"https://cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.html"},{"type":"FIX","url":"https://github.com/fastify/fastify-csrf/pull/51"},{"type":"FIX","url":"https://github.com/fastify/fastify-csrf/security/advisories/GHSA-rc4q-9m69-gqp8"},{"type":"FIX","url":"https://github.com/fastify/csrf/pull/2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fastify/csrf-protection","events":[{"introduced":"0"},{"fixed":"04d05fb613817cb8c723893c241820e1633881a4"}]},{"type":"GIT","repo":"https://github.com/fastify/fastify-csrf","events":[{"introduced":"0"},{"fixed":"04d05fb613817cb8c723893c241820e1633881a4"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"3.1.0"}]}}],"versions":["v1.0.4","v2.0.0","v3.0.0","v3.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29624.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]}