CVE-2025-66415CWE-441

CVE-2025-66415

Medium · published December 2, 2025

CVSS v3.1
5.4
EPSS
0%
Percentile
7.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00179 · 7.1th percentile
Weakness
CWE-441 · Unintended Proxy or Intermediary ('Confused Deputy')
Published
2025-12-02T04:15Z
Affected products (1)
ProductVersionsFixed in
fastify/reply-from≤ 12.4.0—
References (2)
https://github.com/fastify/fastify-reply-from/commit/4d9795cd5b57a36756d37b7f036eae369f69fa66 · [email protected]https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-2q7r-29rg-6m5h · [email protected]
EPSS history
Timeline
  • 01 DEC 22:39Z
    fastify-reply-from bypass of reply forwarding
    cvelistv5