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break-filter-js-from-html

Community

Bypass XSS filters with confidence.

Software Engineering#security#xss#javascript#penetration testing#bypass#html sanitization
AuthorZurybr
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This skill helps security professionals and bug bounty hunters bypass HTML sanitization filters to execute JavaScript, enabling them to test for Cross-Site Scripting (XSS) vulnerabilities.

Core Features & Use Cases

  • Filter Analysis: Systematically identify how sanitization libraries block or preserve HTML elements and attributes.
  • Bypass Categories: Provides structured approaches for exploiting parser differentials, alternative JavaScript vectors, event handler variations, URL-based execution, and CSS-based attacks.
  • Testing Methodology: Guides users in building testing harnesses and performing staged verification to confirm bypasses.
  • Use Case: When performing a penetration test on a web application that sanitizes user-submitted HTML, use this skill to craft payloads that bypass the filter and demonstrate an XSS vulnerability.

Quick Start

Use the break-filter-js-from-html skill to analyze the provided HTML snippet for potential XSS filter bypasses.

Dependency Matrix

Required Modules

None required

Components

references

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: break-filter-js-from-html
Download link: https://github.com/Zurybr/lefarma-skills/archive/main.zip#break-filter-js-from-html

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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