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

TRUNG BÌNH 6.1CVE-2021-22963 · GHSA-p6vg-p826-qp3v · Công bố 14/10/2021 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2021-22963 là lỗ hổng mức TRUNG BÌNH (CVSS 6.1) ảnh hưởng fastify-static (fastify), fastify-static.
Xác suất bị khai thác trong 30 ngày tới (EPSS): 1.2%, cao hơn 67.4% các lỗ hổng khác.
Cách xử lý: cập nhật lên 4.2.4 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
fastify-static fastify	`< 4.2.4`	`4.2.4`
fastify-static npm	`< 4.2.4`	`4.2.4`

Mô tả

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

Mô tả của NVD

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.