2025weight 33.29Platypwnies

Platypwn 2025

5 challenges with 7 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.

Full task list on CTFtime

Uncategorised2

The upstream scoreboard did not say, so neither do we.

Solve it with:Cipher identifier and automatic decoder Learn: Recognising encodings

Copy Pasta
1 official solution
Also written up in: NEMO246/WRITEUP_CTF
Photofriend
1 official solution
Also written up in: NEMO246/WRITEUP_CTF

Binary exploitation1

Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.

Solve it with:ROP gadget finder Shellcode assembler and library Cyclic pattern generator and offset finder Format string exploit builder Learn: Binary exploitation

Pool Party
1000 pts1 writeup
- linux
- nginx
- pwn
- heap
Same technique in picoCTF: vr-school, sice_cream, zero_to_hero

Misc1

Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.

Solve it with:Brainfuck and esolang decoder Cipher identifier and automatic decoder Regex tester with match offsets and capture groups Learn: Recognising encodings

Coin Flip
2 official solutions
Also written up in: NEMO246/WRITEUP_CTF, NEMO246/WRITEUP_CTF

Web1

Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.

Solve it with:JWT decoder and signature verifier JWT alg=none bypass generator Web attack payload catalog JWT secret brute force Learn: Sessions, tokens and access control

HTTP1 must die
2 official solutions
Also written up in: NEMO246/WRITEUP_CTF, NEMO246/WRITEUP_CTF

Uncategorised2

Copy Pasta

Photofriend

Binary exploitation1

Pool Party

Misc1

Coin Flip

Web1

HTTP1 must die

Other 2025 events