ctf-web-java-exploitation

Automate Java web application exploitation in CTF challenges via deserialization.

Updated May 25, 2026

Search Tags:#java #exploitation #web application #ctf #state machine

Ready to run

npx skills add https://github.com/zaiyemeiyou404/Hermes --skill ctf-web-java-exploitation

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: ctf-web-java-exploitation
Source: https://github.com/zaiyemeiyou404/Hermes/tree/main/backup/skills/red-teaming/ctf-web-java-exploitation
Command: npx skills add https://github.com/zaiyemeiyou404/Hermes --skill ctf-web-java-exploitation

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires ysoserial, jshell, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill automates the exploitation of Java web applications within Capture The Flag (CTF) challenges, streamlining complex processes like deserialization and state machine exploitation.

Core Features & Use Cases

Fury Deserialization: Handles deserialization flaws using OGNL expression injection in Fury-powered Java apps.
Platform State Machine: Exploits Java platform state machines for information leakage and multi-step proof chains.
Quick Triage: Offers tools for rapid analysis of agent binaries and theme uploads.

Quick Start

Analyze the given Java web application to find deserialization flaws using the ctf-web-java-exploitation skill.

Frequently Asked Questions about ctf-web-java-exploitation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I exploit Java deserialization vulnerabilities in CTF challenges?▼

To exploit Java deserialization vulnerabilities in CTF challenges, you can automate the process using tools that handle custom deserialization and dynamic compilation. This streamlines generating payloads for Java web applications.

What is Java state machine manipulation and how does it leak information?▼

Java state machine manipulation involves exploiting platform state machines to achieve information leakage. By automating this exploitation, you can uncover multi-step proof chains and extract hidden data from Java web applications.

How do I use OGNL expression injection in Fury-powered Java apps?▼

To use OGNL expression injection in Fury-powered Java apps, you can automate the exploitation of deserialization flaws. This approach specifically targets Fury deserialization mechanisms to execute injected expressions.

Do I need a Java runtime environment to automate Java web application exploitation?▼

Yes, you need a Java runtime environment to automate Java web application exploitation. Knowledge of Java security models and dependencies like ysoserial and jshell is also required for dynamic compilation and payload generation.

How to perform rapid triage on agent binaries and theme uploads in Java CTF challenges?▼

To perform rapid triage on agent binaries and theme uploads in Java CTF challenges, you can use specialized automation tools. These tools analyze Java web applications to quickly identify potential deserialization flaws and security weaknesses.

Does ysoserial work with state machine exploitation for information leakage?▼

Yes, ysoserial can be utilized alongside state machine exploitation techniques to achieve information leakage. It assists in generating deserialization payloads that can trigger multi-step proof chains within vulnerable Java web applications.