CVE-2021-22963: URL Redirection to Untrusted Site ('Open Redirect')

October 5, 2021 (updated October 21, 2021)

A redirect vulnerability in the fastify-static module allows remote attackers to redirect users to arbitrary websites via a double slash // followed by a domain: http://localhost:3000//google.com/%2e%2e. The issue shows up on all the fastify-static applications that set redirect: true option. By default, it is false.

References

github.com/advisories/GHSA-p6vg-p826-qp3v
github.com/fastify/fastify-static/security/advisories/GHSA-p6vg-p826-qp3v
hackerone.com/reports/1354255
nvd.nist.gov/vuln/detail/CVE-2021-22963

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