$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
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Must have
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719 challenges · browse all techniques

Challenge CTF Weight Category Has
restricted_oracle
#padding-oracle
 GPN 2025 – Crypto files wu 2
GISSNINGSLEK
#bash-injection
 Hack.lu 2025 98.02 Misc files wu 1
LOKALTAL
#cve-2023-21688
 Hack.lu 2025 98.02 Pwn files wu 1
Ancient_Monkey
#js-engine
 Hack.lu 2024 100.00 Pwn files wu 1
Bench_Press
#css-injection
 Hack.lu 2024 100.00 Web files wu 1
Do_you_even_lift_bro
#prng
 Hack.lu 2024 100.00 Reverse files wu 2
REGenerating_EXperience
#regex
 Hack.lu 2024 100.00 Reverse files wu 1
HaRlEm_ShAkE
#chacha20-poly1305
 hxp 2024 – Reverse files wu 1
NeedForSpeed
#nfs-filehandle
 hxp 2024 – Misc files wu 1
alcoholic_variety
#mov-attack
 hxp 2024 – Crypto files wu 1
cccircus
#crc
 hxp 2024 – Crypto files wu 1
circus
#crc
 hxp 2024 – Crypto files wu 1
hxp_silicon_foundaries_hack1
#amd-sev
 hxp 2024 – Misc files wu 1
hxp_silicon_foundaries_hack2
#sev-register-injection
 hxp 2024 – Misc files wu 1
hxp_silicon_foundaries_hack3
#iago-attack
 hxp 2024 – Pwn files wu 1
hxp_silicon_foundaries_hack4
#qemu-escape
 hxp 2024 – Pwn files wu 2
phpnotes
#http-request-smuggling
 hxp 2024 – Web files wu 1
suboptimal_pwning
#pointer-guard-bypass
 hxp 2024 – Pwn files wu 1
wreckme_again
#negabinary-fft
 hxp 2024 – Reverse files wu 1
yasashiimon
#mds-sbox-inversion
 hxp 2024 – Reverse files wu 1
Awesomenotes_I
#htmx-injection
 Hack.lu 2023 94.73 Web files wu 2
Awesomenotes_II
#mxss
 Hack.lu 2023 94.73 Web files wu 1
Based_Encoding
#xss
 Hack.lu 2023 94.73 Web files wu 3
Cube_Hash
#brute-force
 Hack.lu 2023 94.73 Reverse files wu 1
Doki_Doki_Anticheat
#renpy
 Hack.lu 2023 94.73 Reverse files wu 2
Ghost
#game-reversing
 Hack.lu 2023 94.73 Reverse files wu 1
Lucky_Numbers
#mersenne-prime
 Hack.lu 2023 94.73 Crypto files wu 1
Spooky_Safebox
#lattice
 Hack.lu 2023 94.73 Crypto files wu 1
byor
#house-of-apple
 Hack.lu 2022 93.70 Pwn files wu 1
htpl
#ast-injection
 Hack.lu 2022 93.70 Web files wu 1
ordersystem
#python-bytecode
 Hack.lu 2022 93.70 Pwn files wu 1
archived
#stored-xss
 hxp 2022 – Web files wu 2
browser_insanity
#stack-overflow
 hxp 2022 – Pwn files wu 2
not_csidh
#isogeny
 hxp 2022 – Crypto files wu 1
one_byte
#call-gate
 hxp 2022 – Pwn files wu 2
required
#javascript-reversing
 hxp 2022 – Reverse files wu 2
sequoa
#discrete-log
 hxp 2022 – Crypto files wu 1
shadertoy_plus_plus
#shader-oob
 hxp 2022 – Pwn files wu 2
sqlite_web
#sqlite-rce
 hxp 2022 – Web files wu 2
tex_based_adventure
#latex
 hxp 2022 – Reverse files wu 2