CVE-2025-66415

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/fastify/fastify-reply-from/commit/4d9795cd5b57a36756d37b7f036eae369f69fa66	Patch
https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-2q7r-29rg-6m5h	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:fastify:reply-from:*:*:*:*:*:node.js:*:*

History

06 Feb 2026, 16:56

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4
First Time		Fastify reply-from Fastify
CPE		cpe:2.3:a:fastify:reply-from::::::node.js::*
References	~~() https://github.com/fastify/fastify-reply-from/commit/4d9795cd5b57a36756d37b7f036eae369f69fa66 -~~	() https://github.com/fastify/fastify-reply-from/commit/4d9795cd5b57a36756d37b7f036eae369f69fa66 - Patch
References	~~() https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-2q7r-29rg-6m5h -~~	() https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-2q7r-29rg-6m5h - Vendor Advisory

01 Dec 2025, 23:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-01 23:15

Updated : 2026-02-06 16:56

NVD link : CVE-2025-66415

Mitre link : CVE-2025-66415

CVE.ORG link : CVE-2025-66415

JSON object : View

Products Affected

fastify

reply-from

CWE

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

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