Medialize is a Javascript URL mutation library. When parsing a URL without a scheme and with excessive slashes, like ///www.example.com, URI.js will parse the hostname as null and the path as /www.example.com. Such behaviour is different from that exhibited by browsers, which will parse ///www.example.com as http://www.example.com instead. For example, the following will cause a redirect to http://www.example.com: A fix was released in version 1.19.11.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-1233
• medialize/URI.js@88805fd
• https://huntr.dev/bounties/228d5548-1109-49f8-8aee-91038e88371c