before_upstream_connection in AuthPlugin in http/proxy/auth.py in proxy.py before 2.3.1 accepts incorrect Proxy-Authorization header data because of a boolean confusion (and versus or).Referenceshttps://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46https://pypi.org/project/proxy.py/2.3.1/#history
