$ 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
DNS_Frenzy L3akCTF 2025 24.43 files
DOM_NOTIFY TFC 2025 – files
Date_Logger QnQSec 2025 24.76 files
Dateiservierer hxp 2025 – files
Dateiservierer2 hxp 2025 – files
DeadMail DeadSec 2025 31.29 files
Deathday_Card Pragyan 2025 – files
Devil_Net_v2 AmateursCTF 2025 – files
Domain_of_Doom WorldWide 2025 24.48 files
Domain_of_Doom_Revenge WorldWide 2025 24.48 files
Double_Trouble niteCTF 2025 – files
Drift_Chat_Revenge SAS 2025 Quals 20.72 files
E4sy_SQLi TSCCTF 2025 – files
EPIC_CAKE_BATTLES_OF_HISTORY BrunnerCTF 2025 24.66 files
EUD_A_I FortID 2025 30.00 files
Eldoria_Panel CyberApocalypse 2025 – files
Eldoria_Realms CyberApocalypse 2025 – files
Enterprise_Template_as_a_Service MaltaCTF 2025 Quals 24.95 files
Evalgelist R3CTF 2025 54.67 files
Everyone_loves_canteen_food CSCG 2025 – files
Evil_Cloner HeroCTF 2025 – files
Expensive_Shop BSidesAlgiers 2025 – files
Extension_Mania smileyCTF 2025 48.61 files
Extension_Mania_revenge smileyCTF 2025 48.61 files
Ez_flag_v3 KalmarCTF 2025 33.89 files
FMC_Starboard MaltaCTF 2025 Quals 24.95 files
FRIENDS Shakti 2025 34.10 files
FaaS QnQSec 2025 24.76 files
Fakebook_Pro TSCCTF 2025 – files
Fakebook_Ultra TSCCTF 2025 – files
Falling_Blocks UMassCTF 2025 48.38 files
Fancy_Web SekaiCTF 2025 55.00 files
File_Vault Pragyan 2025 – files
Finding_X Pragyan 2025 – files
FireLeak PwnSec 2025 – files
FlagGuessr L3akCTF 2025 24.43 files
Flag_Finder Codefest 2025 24.02 files
Flash_Game_Studio UMassCTF 2025 48.38 files
Flask_of_Cookies BackdoorCTF 2025 – files
Flavour_Less bi0sCTF 2025 95.79 files