I am staying at a hotel with free public Wi-Fi. To get Internet access I had to visit a web page and agree to the terms and conditions. This website has a security certificate, but it expired over a year ago.
Evidently this means I can't verify the identity of the sign in page for the Wi-Fi. If I proceed to the page anyway, does this compromise the security of other HTTPS websites in any way (say by enabling MITM attacks)?
I have read other threads on HTTPS over public Wi-Fi, and it seems like it's OK provided I verify the URL and only proceed if the website's certificates are trusted. But does the expired/untrusted certificate on the sign in page introduce any additional security risks?