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Status published
Medium
CVE-2025-66415
fastify-reply-from bypass of reply forwarding
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
fastify
View all reports →Affected Software
fastify-reply-from
Vulnerable Versions:
< 12.5.0
Timeline
Official Publish:
December 1st, 2025
Last Modified:
December 2nd, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
Weaknesses (CWE)
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.