CVE-2023-5654: facebook react-devtools Improper Authorization

Vulnerability summary

CVE-2023-5654 is a medium (CVSS 6.5) Improper Authorization vulnerability in facebook react-devtools. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.4% of scored vulnerabilities.

Timeline

1. 19-10-2023
   PublishedVulnerability first disclosed.
2. 12-09-2024
   Last modifiedVulnerability information updated.

Description

The React Developer Tools extension registers a message listener with window.addEventListener('message', <listener>) in a content script that is accessible to any webpage that is active in the browser. Within the listener is code that requests a URL derived from the received message via fetch(). The URL is not validated or sanitised before it is fetched, thus allowing a malicious web page to arbitrarily fetch URL’s via the victim's browser.

• CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
• CWE-116Improper Encoding or Escaping of OutputThe product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.