A Cross Site Scripting (XSS) vulnerability exists in Codex before 1.4.0 via Notebook/Page name field, which allows malicious users to execute arbitrary code via a crafted http code in a .json file.
{ "versions": [ { "introduced": "0" }, { "fixed": "1.4.0" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43635.json"