SB2021022330 - Improper access control in Fastify-http-proxy

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021022330

SB2021022330 - Improper access control in Fastify-http-proxy

Published: February 23, 2021 Updated: July 20, 2026

Security Bulletin ID SB2021022330
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2021-21322)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to access unintended proxied backend resources and disclose or modify sensitive information.

The vulnerability exists due to improper access control in the URL prefix handling of fastify-http-proxy when processing a specially crafted URL. A remote attacker can send a specially crafted request to access unintended proxied backend resources and disclose or modify sensitive information.


Remediation

Install update from vendor's website.

References