$ ctf42

#java CTF challenges

3 CTF challenges using java from 3 CTFs (2022–2025), 3 with writeups. Mostly Web (67%) and Reverse (33%).

Web · 2 Reverse · 1

Often combined with

#war-deploy-rce 1 #wildfly-undertow-temp-file-upload 1 #insecure-deserialization 1 #android 1 #apk-reversing 1 #rc4 1

Challenges

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Challenge CTF Weight Category Has
jabasass 0CTF 2022 100.00 Web files wu 1
Serialies SwampCTF 2025 40.40 Web files wu 1
Lightbulb CyberSecurityRumble 2023 Quals 24.80 Reverse files wu 1