# STEM CTF Cyber Challenge 2019 – Super Secret Hidden Service
* **Category:** Web* **Points:** 50
## Challenge
> https://138.247.13.115
## Solution
Connecting to the website the following message is prompted.
```421 Site 138.247.13.115 is not served on this interface```
The website is under HTTPS, but the certificate seems invalid. Analyzing the certificate, you will discover that it was created for the host `138.247.13.115.xip.io`.
Connecting to `https://138.247.13.115.xip.io/` will print the flag.
```MCA{shuHeimoowaiF5a}```