The React Developer Tools extension registers a message listener with window.addEventListener('message', ) 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.
CVE-2023-5654 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-5654 The React Developer Tools extension registers a message listener with window.addEventListener('message', ) 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. 2023-10-19T15:15:09Z