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deserialization-insecure

Identify insecure deserialization sinks and generate exploitation paths.

11|4|Updated Jun 7, 2026
Search Tags:#payload generation#deserialization#viewstate#phar#ysoserial#gadget chains#traffic fingerprinting
One-click install
npx skills add https://github.com/sayseven7/frameseven --skill deserialization-insecure-sayseven7
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: deserialization-insecure
Source: https://github.com/sayseven7/frameseven/tree/main/internal/mcp/skills/deserialization-insecure
Command: npx skills add https://github.com/sayseven7/frameseven --skill deserialization-insecure-sayseven7

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps you identify and assess insecure deserialization pathways that can turn untrusted data into code execution, file access, or privilege escalation risks in web applications and services.

Core Features & Use Cases

  • Sink discovery and fingerprinting: Recognizes Java serialized objects, PHP serialized payloads, Python pickle blobs, Ruby Marshal data, .NET ViewState and BinaryFormatter formats, and related protocol clues.
  • Gadget-chain selection: Guides you toward the right exploit path based on dependency sets, framework fingerprints, and version constraints across Java, PHP, Python, Ruby, .NET, and Node.js.
  • Payload strategy and confirmation: Supports safe validation probes, tool selection, and format-specific generation workflows for authorized security testing and red-team simulation.
  • Use case: Analyze an application that stores a base64 cookie or hidden field, determine whether it is a deserialization sink, and then choose the most reliable proof-of-concept chain for the target runtime.

Quick Start

Use the deserialization-insecure skill to inspect the target payload format, identify the likely runtime and gadget surface, and propose the safest confirmation and exploitation path for authorized testing.

Frequently Asked Questions about deserialization-insecure

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

FAQPage Schema
How do I identify insecure deserialization sinks in web applications?▼

To identify insecure deserialization sinks, inspect web traffic for serialized data formats like Java objects, PHP payloads, Python pickle blobs, Ruby Marshal data, and .NET ViewState. Traffic fingerprinting reveals these untrusted data inputs that could trigger code execution or privilege escalation risks.

What is the best way to generate deserialization payloads for authorized security testing?▼

The best way to generate deserialization payloads is using format-specific tools like ysoserial, PHPGGC, and ysoserial.net. These tools construct gadget chains tailored to the target runtime, allowing safe validation probes to confirm exploitability without causing unintended damage.

How do I select the right gadget chain for a specific framework or runtime?▼

Select the right gadget chain by analyzing the target's dependency sets, framework fingerprints, and version constraints. Matching these environmental factors against available gadget libraries ensures reliable proof-of-concept execution across Java, PHP, Python, Ruby, .NET, and Node.js scenarios.

Can I use ysoserial and PHPGGC to test both Java and PHP deserialization vulnerabilities?▼

Yes, you can use ysoserial for Java and PHPGGC for PHP to test deserialization vulnerabilities. These payload generation tools support framework-specific gadget chains and enable safe confirmation probes for authorized red-team simulation and security testing.

How do I safely confirm a deserialization vulnerability without breaking the application?▼

Safely confirm a deserialization vulnerability by using safe validation probes and carefully selected payload generation workflows. This approach verifies the presence of insecure deserialization sinks without executing destructive commands or disrupting application availability.

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