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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
essveegee UIUCTF 2021 – files
file-upload S4CTF 2021 24.52 files
flaskofpickles LexingtonInformaticsTournament 2021 23.87 files
generic-pastebin idekCTF 2021 24.56 files
guestfs_afr zer0pts 2021 24.56 files
gyOTAKU TsukuCTF 2021 – files
hackus Pwn2Win 2021 83.41 files
imagehub X-MAS 2021 – files
junior-login S4CTF 2021 24.52 files
kenschronicle InCTF 2021 70.41 files
lazy-admin redpwn 2021 32.61 files
logonly TsukuCTF 2021 – files
lottery-again StarCTF 2021 – files
miniaturehorsedb UIUCTF 2021 – files
neutron BSidesAhmedabad 2021 25.00 files
nomnomnom angstromCTF 2021 – files
notes redpwn 2021 32.61 files
notpdfgen zer0pts 2021 24.56 files
number_manager ASIS 2021 Quals 89.22 files
oh-my-note StarCTF 2021 – files
oh-my-socket StarCTF 2021 – files
omgsosmolhowhacc PBjar 2021 23.18 files
pastebin-2-social-edition redpwn 2021 32.61 files
pastebin-3 redpwn 2021 32.61 files
pawnshop 3kCTF 2021 24.14 files
pdfGen zer0pts 2021 24.56 files
phphphp ASIS 2021 Quals 89.22 files
pugpug BSidesAhmedabad 2021 25.00 files
quotehub X-MAS 2021 – files
roda BSidesAhmedabad 2021 25.00 files
saas idekCTF 2021 24.56 files
silly-filly MCTF 2021 Quals – files
snakeholessecret InCTF 2021 70.41 files
sosafewebsite S4CTF 2021 24.52 files
sozu BuckeyeCTF 2021 24.81 files
speed-trivia-app BSidesTLV 2021 23.94 files
threefactooorx DEFCON 2021 Quals 80.92 files
trading-api Hack.lu 2021 94.48 files
w3f Securinets 2021 Quals 41.71 files
wtjs redpwn 2021 32.61 files