URL Redirection to Untrusted Site ('Open Redirect') in fastify-static

中 6.1CVE-2021-22963 · GHSA-p6vg-p826-qp3v · 14/10/2021 公開 · 17/06/2026 更新

要点

CVE-2021-22963 は fastify-static (fastify), fastify-static に影響する深刻度「中」 (CVSS 6.1) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.2%（全脆弱性の 67.4% より高い）。
対処：4.2.4 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
fastify-static fastify	`< 4.2.4`	`4.2.4`
fastify-static npm	`< 4.2.4`	`4.2.4`

概要

Impact

A redirect vulnerability in the fastify-static module allows remote attackers to redirect Mozilla Firefox 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.

Patches

The issue has been patched in [email protected]

Workarounds

If updating is not an option, you can sanitize the input URLs using the rewriteUrl server option.

References

Bug founder: drstrnegth
hackerone Report

For more information

If you have any questions or comments about this advisory:

Open an issue in fastify-static
Contact the security team

NVD の説明

A redirect vulnerability in the fastify-static module version < 4.2.4 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.