x3CTF Archive

openECSC 2025

Web Design

Data

• #announcements dump (TBD)
• Challenges GitHub (TBD)
• CTFTime page

Writeups

• Top 3
• frivolousuov by lolipop
• kittychat-secure by Jorian Woltjer
• polish-bar by Bluuk
• ~
• plfanzen-laden by hibwyli
• multiple challenges by zeba
• exitnction by Clemens.Gooooo
• swaped by Clemens.Gooooo
• avalonia by Clemens.Gooooo
• exitnction by z0v3r1n
• scrabled-randomness by DimT
• weird-transmitter by DimT
• kv-messenger by siunam

2025

Web Design

Data

• #announcements dump
• Challenges GitHub
• CTFTime page
• Discord invite

Writeups

• kittyconvert Writeup by exe2py (1st place!)
• rev writeups by scufFed (2nd place!)
• ~
• blogdog (+ new CSS Injection XS-Leak!) by Jorian Woltjer
• MVMCheckers Inc writeup by Oshawk
• blogdog(web) Write up by ensy
• Curved MVM writeup by Kesero
• MVM writeup by hivesec
• various writeups by William Lin
• oh-my-writeup by pingotux
• Submission video walkthrough by ZeroDay Gym
• Submission video walkthrough by SloppyJoePirates
• MVMCheckers Inc writeup by siunam321