Vulnerability in Fastify Fastify-Reply-From
CVE-2023-51701
fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. A reverse proxy server built with `@fastify/reply-from` could misinterpret the incoming body by passing an header `ContentType: application/json ; charset=utf-8`. This can lead to bypass of security checks. This vulnerability has been patched in '@fastify/reply-from` version 9.6.0.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Fastify Fastify-Reply-From — versions < 9.6.0
- Fastify Reply-From
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/fastify/fastify-reply-from/security/advisories/GHSA-v2v2-hph8-q5xp (Vendor Advisory)
- github.com/fastify/fastify-reply-from/releases/tag/v9.6.0 (Release Notes)
Frequently asked questions
- What is CVE-2023-51701?
- CVE-2023-51701 is a medium-severity vulnerability in Fastify Fastify-Reply-From, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2024-01-08.
- How severe is CVE-2023-51701?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-51701 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.