Tag Group:Web Challenges Posts Writeups Leaked messages -- CTFZone 2017 MrFuturePresidentBlog -- CTFZone 2017 MrPresidentFeedback -- CTFZone 2017 Buy me a coin -- Pixels Camp CTF Qualifiers 2019 secret note keeper -- Facebook CTF 2019 notes-app -- Backdoor CTF 2019 cr0wnair -- Union CTF 2021 nodedb -- hack.lu 2021 HTPL -- hack.lu 2022