CVE-2021-23597

Name: CVE-2021-23597
Creator: NVD / NIST
Published: 2022-02-11T17:15:08.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.00%

Last modified Jun 17, 2026

CVE-2021-23597 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. This affects the package fastify-multipart before 5.3.1. By providing a name=constructor property it is still possible to crash the application. EPSS estimates a 2.00% chance of exploitation in the next 30 days.

Description

This affects the package fastify-multipart before 5.3.1. By providing a name=constructor property it is still possible to crash the application. **Note:** This is a bypass of CVE-2020-8136 (https://security.snyk.io/vuln/SNYK-JS-FASTIFYMULTIPART-1290382).

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.00%

78.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Fastify	Fastify-Multipart	< 5.3.1

References

https://github.com/fastify/fastify-multipart/commit/a70dc7059a794589bd4fe066453141fc609e6066Patch, Third Party Advisory
https://github.com/fastify/fastify-multipart/releases/tag/v5.3.1Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-FASTIFYMULTIPART-2395480Exploit, Patch, Third Party Advisory
https://github.com/fastify/fastify-multipart/commit/a70dc7059a794589bd4fe066453141fc609e6066Patch, Third Party Advisory
https://github.com/fastify/fastify-multipart/releases/tag/v5.3.1Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-FASTIFYMULTIPART-2395480Exploit, Patch, Third Party Advisory

Timeline

Published: Feb 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23597?

How severe is CVE-2021-23597?

CVE-2021-23597 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.00% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23597?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23597?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST