CTF Time

Name: HKCERT CTF 2025 (Qualifying Round) (an HKCERT CTF event.)
Date: Dec. 19, 2025, 8 a.m. — 21 Dec. 2025, 08:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.hkcert.org/
Rating weight: 83.21
Event organizers: HKCERT

Name: TSG CTF 2025 (an TSG CTF event.)
Date: Dec. 20, 2025, 7 a.m. — 21 Dec. 2025, 07:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://score.ctf.tsg.ne.jp/
Rating weight: 25.00
Event organizers: TSG

Name: MetaCTF December 2025 Flash CTF (an MetaCTF event.)
Date: Dec. 20, 2025, 5 p.m. — 20 Dec. 2025, 20:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://mctf.io/dec2025
Rating weight: 0
Event organizers: MetaCTF

Name: BSides Algiers 2025 (an BSides Algiers event.)
Date: Dec. 18, 2025, 7 p.m. — 20 Dec. 2025, 07:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://bsides-algiers-2k25.shellmates.club/
Rating weight: 22.90
Event organizers: Shell7even

Name: SecurITy Challenge - VianuCTF 2025 (an SecurITy Challenge - VianuCTF event.)
Date: Dec. 16, 2025, 7:30 a.m. — 16 Dec. 2025, 14:30 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://vianuhack.club/
Rating weight: 0
Event organizers: vianu_hack

Name: niteCTF 2025 (an niteCTF event.)
Date: Dec. 12, 2025, noon — 14 Dec. 2025, 12:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://nitectf25.live/
Rating weight: 39.87
Event organizers: Cryptonite

Name: SECCON CTF 14 Quals (an SECCON CTF event.)
Date: Dec. 13, 2025, 5 a.m. — 14 Dec. 2025, 05:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.seccon.jp/
Rating weight: 100.00
Event organizers: SECCON CTF

Name: Cybercoliseum IV (an Codeby Games event.)
Date: Dec. 13, 2025, 7 a.m. — 14 Dec. 2025, 07:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://cybercoliseum.hackerlab.pro/en
Rating weight: 0.00
Event organizers: Codeby Games

Name: NexHunt CTF (an NexHunt CTF event.)
Date: Dec. 11, 2025, 6 p.m. — 13 Dec. 2025, 10:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://nexus-security.club/
Rating weight: 23.73
Event organizers: Nexus Team

Name: BackdoorCTF 2025 (an BackdoorCTF event.)
Date: Dec. 6, 2025, noon — 08 Dec. 2025, 12:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://backdoor.infoseciitr.in/
Rating weight: 71.35
Event organizers: InfoSecIITR

Name: WannaGame Championship 2025 (an WannaGame Championship event.)
Date: Dec. 6, 2025, 1 a.m. — 08 Dec. 2025, 01:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.cnsc.com.vn/
Rating weight: 29.00
Event organizers: Wanna.One

Name: P3rf3ctr00t CTF 2025 (an P3rf3ctr00t CTF event.)
Date: Dec. 5, 2025, 3 p.m. — 07 Dec. 2025, 15:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.perfectroot.wiki/
Rating weight: 24.40
Event organizers: p3rf3ctr00t_ke

Name: Null CTF 2025 (an Null CTF event.)
Date: Dec. 5, 2025, 3 p.m. — 07 Dec. 2025, 15:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.r0devnull.team/
Rating weight: 25.00
Event organizers: r0/dev/null

Name: VuwCTF 2025 (an VuwCTF event.)
Date: Dec. 5, 2025, 9 p.m. — 07 Dec. 2025, 04:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://2025.vuwctf.com/
Rating weight: 25.00
Event organizers: VuwCTF

Name: CyKor CTF 2025 (an CyKor CTF event.)
Date: Dec. 6, 2025, 1 a.m. — 07 Dec. 2025, 01:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.cykor.kr/
Rating weight: 25.00
Event organizers: CyKOR

Name: Metared Argentina 2025 (an Metared Argentina event.)
Date: Dec. 4, 2025, noon — 05 Dec. 2025, 12:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.cert.unlp.edu.ar/
Rating weight: 0.00
Event organizers: CERTUNLP

Name: BlackHat MEA CTF Final 2025 (an Blackhat MEA CTF event.)
Date: Dec. 2, 2025, 8 a.m. — 04 Dec. 2025, 15:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Riyadh
Offical URL: https://blackhatmea.com/capture-the-flag
Rating weight: 22.50
Event organizers: SAFCSP

Name: Ukrainian National CTF (an Ukrainian National CTF event.)
Date: Nov. 20, 2025, midnight — 01 Dec. 2025, 00:00 UTC  [add to calendar]
Format: Hack quest
On-line
Offical URL: https://hackenproof.com/gur-national-ctf-en
Rating weight: 0
Event organizers: Hacken Proof

Name: HeroCTF v7 (an HeroCTF event.)
Date: Nov. 28, 2025, 8 p.m. — 30 Nov. 2025, 22:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.heroctf.fr/
Rating weight: 65.00
Event organizers: HeroCTF

Name: Haix-la-Chapelle 2025 (an Haix-la-Chapelle event.)
Date: Nov. 29, 2025, 9 a.m. — 30 Nov. 2025, 09:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://haix-la-chapelle.eu/
Rating weight: 24.00
Event organizers: Pwn-la-Chapelle