PT-2025-48579 · Unknown · @Fastify/Reply-From

Published 2025-12-01 · Updated 2026-02-06 · CVE-2025-66415

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions fastify-reply-from versions prior to 12.5.0

Description fastify-reply-from is a Fastify plugin used to forward HTTP requests to another server. Versions of the plugin prior to 12.5.0 contain a flaw where a malicious URL can be crafted to allow an attacker to access routes that are not permitted, even when the reply.from functionality is configured to restrict access to specific routes.

Recommendations Update to version 12.5.0 or later.

Exploit

Fix

Weakness Enumeration

CWE-441

Related Identifiers

CVE-2025-66415

GHSA-2Q7R-29RG-6M5H

Affected Products

@Fastify/Reply-From

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66415.json · Exploit
• https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-2q7r-29rg-6m5h · Vendor Advisory
• https://github.com/fastify/fastify-reply-from/commit/4d9795cd5b57a36756d37b7f036eae369f69fa66 · Patch
• https://osv.dev/vulnerability/CVE-2025-66415 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66415 · Security Note
• https://t.me/cveNotify/151156 · Telegram Post
• https://twitter.com/CVEnew/status/1995626925834776985 · Twitter Post
• https://t.me/CVEtracker/38611 · Telegram Post