We've received an image with the names of members belonging to the group Hackadem. The images show the username of each member in root-me Digging into each username in root-me, the username "Xx_Noel_Janvier_xX" shows quite some information, there is a website called Gorfouland. Clicking on the website, we can find more information since a twitter link is present on the bottom left of the web page. After checking at his followers, the user Pablo Sintera was the one that retain my attention. Checking on the tweets and replies from Pablo Sintera, it indicates on the 10th may that the website redirected him in another website. The URL of the website is "https://e10pthes.github.io", it is using github page to create the website. Therefore, most of the code is probably public. Looking at the github, it didn’t show anything special. Last commit was 5 months ago. But checking at the other repositories, another one has been updated on the 11th of May. By looking at the commit, you can see the changes that the user has made. We see that the url "http://hallebarde.duckdns.org" has been replaced by ./form-validation.html.
Reaching that domain, the flag is present.