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.
Published: 2025-12-01
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-2q7r-29rg-6m5h fastify-reply-from affected by bypass of reply forwarding
History

Fri, 06 Feb 2026 17:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:fastify:reply-from:*:*:*:*:*:node.js:*:*
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}


Wed, 17 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

threat_severity

Moderate


Tue, 02 Dec 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 02 Dec 2025 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Fastify
Fastify reply-from
Vendors & Products Fastify
Fastify reply-from

Mon, 01 Dec 2025 22:45:00 +0000

Type Values Removed Values Added
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.
Title fastify-reply-from bypass of reply forwarding
Weaknesses CWE-441
References
Metrics cvssV4_0

{'score': 6.9, 'vector': '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'}


Subscriptions

Fastify Reply-from
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-02T14:13:45.644Z

Reserved: 2025-11-28T23:33:56.366Z

Link: CVE-2025-66415

cve-icon Vulnrichment

Updated: 2025-12-02T14:13:41.816Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-01T23:15:54.053

Modified: 2026-02-06T16:56:00.390

Link: CVE-2025-66415

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-01T22:39:32Z

Links: CVE-2025-66415 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-12-02T11:58:59Z

Weaknesses