What is the CVSS score of CVE-2025-66415?

CVE-2025-66415 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Reply From are affected by CVE-2025-66415?

Organizations using to forward the current HTTP request to another server. should be aware of moderate risk from CVE-2025-66415 rated CVSS 5.4.. A patch is available.

How to fix or mitigate CVE-2025-66415?

Within 30 days: Identify affected systems running to forward the current HTTP request to another server. and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Reply From CVE-2025-66415

EUVD-2025-200117 MEDIUM

Unintended Proxy or Intermediary ('Confused Deputy') (CWE-441)

2025-12-01 security-advisories@github.com

GHSA-2q7r-29rg-6m5h

Information Disclosure Reply From Red Hat

5.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Red Hat

6.5 MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 13:34 euvd

EUVD-2025-200117

Analysis Generated

Mar 15, 2026 - 13:34 vuln.today

Patch released

Mar 15, 2026 - 13:34 nvd

Patch available

CVE Published

Dec 01, 2025 - 23:15 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

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.

AnalysisAI

A security vulnerability in to forward the current HTTP request to another server. (CVSS 5.4). Remediation should follow standard vulnerability management procedures. Vendor patch is available.