ECSC 2025 Writeups¶

My writeups for challenges from the ECSC 2025 Finals competition.

About¶

The European Cybersecurity Challenge (ECSC) is the premier European cybersecurity competition for young talents. Each year, the best young hackers from across Europe compete in national qualifiers, with the top performers advancing to represent their countries in an international final. ECSC 2025 Finals brought together the most skilled cybersecurity enthusiasts from European nations to compete in a high-stakes jeopardy and attack-defense CTF in Warsaw, Poland.

Event Details:

Duration: October 6-9, 2025
Location: Warsaw, Poland
Format: Jeopardy-style and Attack-Defense CTF
Website: https://ecsc25.pl/

Challenges Solved¶

Web¶

Flag Szop - PHP type juggling, SSRF via imgproxy, multipart upload exploitation

Misc¶

Blue Mouse - Bluetooth HID mouse packet capture analysis and visualization

Competition Stats¶

Event: ECSC 2025 Finals
Team: Team Lithuania
Challenges Solved: 11
Personal Challenges Solved: 4
Points: 1459
Rank: 30th place