fastify-reply-from bypass of reply forwarding_CVE-2025-66415

6.9 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Description

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. Prior to 12.5.0, by crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. This vulnerability is fixed in 12.5.0.

Basic Information

ID CVE-2025-66415

Source GitHub_M

Published Dec 1, 2025 at 22:39

Affected Product

Vendor fastify

Product fastify-reply-from

Version < 12.5.0

Affected Versions fastify fastify-reply-from < 12.5.0

CWE Classification

CWE-441

References

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    "published": "2025-12-01T22:39:32.468Z",
    "modified": "2025-12-01T22:39:32.468Z",
    "type": "cve",
    "title": "fastify-reply-from bypass of reply forwarding",
    "source": "GitHub_M",
    "references": "https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-2q7r-29rg-6m5h\nhttps://github.com/fastify/fastify-reply-from/commit/4d9795cd5b57a36756d37b7f036eae369f69fa66",
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