Medium severity6.5NVD Advisory· Published May 19, 2021· Updated Jun 17, 2026
CVE-2021-29624
CVE-2021-29624
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
fastify-csrfnpm | < 3.1.0 | 3.1.0 |
Affected products
3Patches
Vulnerability mechanics
References
8- github.com/fastify/csrf/pull/2nvdPatchThird Party AdvisoryWEB
- github.com/fastify/fastify-csrf/pull/51nvdPatchThird Party AdvisoryWEB
- github.com/fastify/fastify-csrf/security/advisories/GHSA-rc4q-9m69-gqp8nvdPatchThird Party AdvisoryWEB
- cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.htmlnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-rc4q-9m69-gqp8ghsaADVISORY
- github.com/fastify/fastify-csrf/releases/tag/v3.1.0nvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-29624ghsaADVISORY
- owasp.org/www-pdf-archive/David_Johansson-Double_Defeat_of_Double-Submit_Cookie.pdfnvdThird Party AdvisoryWEB
News mentions
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