Over the weekend, our team competed in XCTF Finals in China as the only international team among 28. We placed 3rd place overall and 1st in the professional division. Huge thanks to @XCTF_League for the amazing event and high quality challenges. Hope to be back next year!

Last week we were in Nanjing, China for the Cyber Mimic Defense Finals and had an amazing time. We were proud to earn 3rd prize in the CTF track, and we are grateful to @XCTF_League for hosting such a great event. This was our third year onsite, and we hope to be back next year!

Enjoy the best experience on X.

Made it to MSRC 2025 Q3 Leaderboard ranking #9 in MSRC Office Scoreboard with #28 ranking overall. Thanks @msftsecresponse My reports. CVE-2025-59243, CVE-2025-59226, CVE-2025-50165

https://t.co/w88tBrAlXu

We are happy to host osu!gaming CTF 2025 (Rhythm Game Edition), happening next weekend. View the prizes and register at: https://t.co/4kDPWTYsaF @osugame is a fast-paced, precision-oriented rhythm game. Now, with osu!gaming CTF, we've brought the excitement to the world of CTFs.

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We’re excited to share the new Happi coat swag we received from @osec_io! OtterSec has been a generous sponsor for SekaiCTF (2022–2025) and several onsite finals including SECCON CTF and DEFCON — we’re truly grateful.

DefCamp CTF 2025 Quals are LIVE! There is still time for you to join the fight - register now 👉 https://t.co/fG0yl6DwGs Good luck and see you on the leaderboard!

[+] @hackthebox_eu 6-month VIP+ Winners: 1. gromji: Blockchain – Sekai Lending https://t.co/EdHUt2Eol7 2. maeisbad: Web – Captivating Canvas Contraption https://t.co/BXitOCp8Tm 3. sina2446: Crypto – Alter Ego https://t.co/DXMfGVQa8R [+] @vector35 Binary Ninja Personal License:

Announcing #SekaiCTF 2025 writeup prize winners: [+] Cash Prize Winners: 1. 0xh3g4z1: Web – My Flask App https://t.co/ft2Qv3Etiw 2. apdix: Reverse – Miku Music Machine https://t.co/HySwGHLKLV 3. fexsped: Pwn – Learning OOP https://t.co/6blL1g3SDB 4. y.k.z: Misc – Sekai Bank -

Sleigh the season with the most personal gift around. Get them a Cameo video!

Backing the fight, backing the #hackers. We’re proud to support #DefCamp Capture the Flag (D-CTF) 2025 — one of the biggest cybersecurity battlegrounds in Central Eastern Europe! 🗓️Qualifications Phase: Sept 12, 1:00 PM - Sept 14, 1:00 PM (online on CyberEDU) Expect challenges

🎉 Last weekend, we teamed up with @ProjectSEKAIctf as P1G SEKAI and secured 2nd place at corCTF 2025! 🙏 Huge thanks to the @cor_ctf team for their excellent organization and high-quality challenges

corCTF 2025 has ended! Congrats to the top 5: 1. @FlatNetworkOrg 2. @r3kapig @ProjectSEKAIctf 3. The Amazing Digital Orange 4. @TheRomanXpl0it 5. STM Thank you to all of our players and sponsors! @osec_io, Research Innovations, @ret2systems, @trailofbits, @vector35, @googlecloud

Two of the challenges got solved after the CTF. Congratulations to them for winning the bounties!

When the waves hit, strength isn't enough. NOT WITHOUT HOPE - a true fight for survival.

Bucharest Syndrome: @TheFewChosenTFC @SNHTse @thehackerscrew1

[+] Source Code Release Official challenge source code and writeups (with the exception of ongoing bounties) are now available on GitHub. Feel free to leave a star! https://t.co/FOFvLaHvtR [+] Writeup Competition Here is the writeup competition submission link:

Some additional stats: - 38 challenges in total - Sanity Check has the most solves (936). 5 challenges remained unsolved - 4599 users registered - 2235 teams registered - 1060 teams scored, 657 without sanity check or survey - 3230 correct flags submitted

Four bounties remain unclaimed. We are extending these three for one more week — the first team to open a ticket with the flag wins: - 6◆ pwn/WIC: $200 for the🩸First Solve - 6◆ crypto/unfairy-ring++: $200 for the🩸First Solve - 5◆ crypto/unfairy-ring: $100 for the🩸First

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SekaiCTF 2025 is officially over. Thanks everyone for participating! We hope you enjoyed it. We will read all your feedback carefully to improve next edition. 🥇@0rganizers 🥈Bucharest Syndrome 🥉@Nu1L_Team 🏅@r3kapig 🏅@fluxfingers @KITCTF Congratulations to top 10! As a

This year we AK all blockchain challenges in SekaiCTF once again, its very nice to work on these challenges with my teammate ranwen🥰 (but we only got two small bounties🙃) Thanks to the organizers for preparing such diverse and interesting challenges @ProjectSEKAIctf

This weekend we played @CTFZone Quals during organizing SekaiCTF, and got 5th place into the Finals! Congrats to @r3kapig for winning.