CVE-2025-66415

MEDIUM

fastify/reply-from < 12.5.0 - Unintended Proxy Access via Malicious URL

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 5.4
EPSS 0.0015
EPSS Percentile 4.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-441
Status published
Products (2)
fastify/reply-from < 12.4.0
fastify/reply-from 0 - 12.5.0npm
Published Dec 01, 2025
Tracked Since Feb 18, 2026