$ ctf42

Web CTF challenges

2,461 Web CTF challenges from 309 CTFs (2011–2026), 673 with writeups.

Top web techniques

#xss 70 #sql-injection 41 #ssti 30 #ssrf 26 #prototype-pollution 25 #path-traversal 25 #csp-bypass 23 #command-injection 21 #web 21 #filter-bypass 14 #xs-leak 14 #lfi 12 #rce 12 #race-condition 12 #css-injection 11

Challenges

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Challenge CTF Weight Has
Invitation DreamhackInvitational 2025 Quals – files
Ippon_Practice_Tool FullWeakEngineer 2025 24.60 files
JS_Safe_6.0 GoogleCTF 2025 – files
JWTF BYUCTF 2025 – files
Jey_is_not_my_son FortID 2025 30.00 files
KISSFIXESS TFC 2025 – files
KISSFIXESS_REVENGE TFC 2025 – files
KalmarDSL KalmarCTF 2025 33.89 files
KalmarNotes KalmarCTF 2025 33.89 files
Keeper TRX 2025 – files
King_of_the_Board CrewCTF 2025 38.93 files
Leaf smileyCTF 2025 48.61 files
Legal_Snacks CubeCTF 2025 24.71 files
Level_Up LINE 2025 – files
LookingMyEyes L3HCTF 2025 54.67 files
Lost_In_Transliteration GoogleCTF 2025 – files
LouvreArchives DaVinciCTF 2025 32.59 files
Love_Notes CrewCTF 2025 38.93 files
MARQUEE Hack.lu 2025 98.02 files
MCP_Mayhem BackdoorCTF 2025 – files
MVMCheckers-Inc x3ctf 2025 – files
MYTHOS GoogleCTF 2025 – files
MagicAuth LakeCTF 2025 Quals – files
Magik m0leCon 2025 Quals 75.00 files
Manual_Interaction Kind4SUS 2025 – files
MarketFlow BackdoorCTF 2025 – files
Masquerade Codegate 2025 Quals – files
MaxPayne PwnSec 2025 – files
MaybeHappyEndingGPT SwampCTF 2025 40.40 files
Mdb MCTF 2025 Quals – files
MemoService Codegate 2025 Quals – files
MidMayhem Shakti 2025 34.10 files
Mini_Messenger HaixlaChapelle 2025 – files
Modern_Banking TAMUctf 2025 – files
Monkey_Shop Auvergnhack 2025 – files
More_Request_Handling DownUnderCTF 2025 91.66 files
Movie_time_table Dreamhack 2025 – files
Moving_Slowly TAMUctf 2025 – files
My_Flask_App SekaiCTF 2025 55.00 files
My_Flask_App bi0sCTF 2025 95.79 files