ImaginaryCTF 2025 Challenges

These are the challenges for ImaginaryCTF 2025, which was held from September 5-7.

All difficulties are according to challenge authors and may not represent true difficulty.

Challenge List

Crypto

Challenge	Difficulty (1-10)	Wave
redacted	2	1
leaky-rsa	2	2
bigger-rsa	3	1
leaky-rsa-revenge	3	3
feistier-network	4	2
scalar-division	4	1
extra-crunchy-bits	5	1
clcg	5	1
zkpow	5	2

Forensics

Challenge	Difficulty (1-10)	Wave
wave	1	1
dinosaur	2	1
obfuscated-1	2	2
x-tension	3	3
thrift-store	4	1
obfuscated-2	6	2
nightcore	6	1
system-hardening-11	8	3

Misc

Challenge	Difficulty (1-10)	Wave
sanity-check	1	1
discord	1	1
survey	1	3
significant	2	1
tax-return	3	2
zoom	4	2
twisted	4	1
whoami	5	2
PBJ	7	1

Pwn

Challenge	Difficulty (1-10)	Wave
babybof	1	1
addition	2	1
avalanche	3	2
twowrite	4	1
multiplication	5	2
cascade	5	1
fiumicino	5	2
stillerer-printf	6	1

Reversing

Challenge	Difficulty (1-10)	Wave
nimrod	2	1
weird-app	4	2
comparing	4	1
memory	5	1
illegal	6	1
stacked	6	3
questionably-distributed	8	1

Web

Challenge	Difficulty (1-10)	Wave
codenames-1	2	1
passwordless	2	1
imaginary-notes	2	2
certificate	3	3
pearl	3	1
codenames-2	4	1
pwntools	6	2