Jake Miller a security researcher discovered a serious flaw in proxies that allow h2c clear text upgrade and bypass proxy rules. Let us discuss
Thanks to @Textras for sending this article!
https://twitter.com/thebumblesec/status/1303305853525725184?s=21
https://labs.bishopfox.com/tech-blog/h2c-smuggling-request-smuggling-via-http/2-cleartext-h2c?hs_amp=true