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Independent project, not affiliated with Anthropic
yaklang avatar

Xss Cross Site Scripting

yaklang/hack-skills
2.8k installs1.6k stars
Summary

This is a practical XSS reference that skips the basics and goes straight to the techniques that catch people off guard. You get context-specific payloads for when reflection lands in HTML attributes, JavaScript strings, or DOM sinks, plus WAF bypass strategies like parameter name injection and encoding chains. The multi-reflection attacks and CSP bypass section using JSONP endpoints or AngularJS CDN whitelists are especially useful for real pentests. It assumes you already know alert(1) and focuses on the stuff base models miss: postMessage origin bypasses, PHP_SELF path injection, and framework-specific vectors. The routing to companion files for mXSS, DOM clobbering, and XS-Leaks is helpful when you need to go deeper without cluttering the main playbook.

Install to Claude Code

npx -y skills add yaklang/hack-skills --skill xss-cross-site-scripting --agent claude-code

Installs into .claude/skills of the current project.

CodeRabbit
CodeRabbit
AI writes the code. CodeRabbit catches the slop.
Try For Free →
belt - the only tool your agent needs
belt - the only tool your agent needs
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
inference shell
inference shell
create and run specialised agents in minutes
build now →
MCP-ready Email SendingMCP-ready Email Sending
MCP-ready Email Sending
Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →
Make your agent a DeFi expert
Make your agent a DeFi expert
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →
Capacitor - Shared memory for your team’s coding agents.
Capacitor - Shared memory for your team’s coding agents.
Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →
CodeScene MCP ServerCodeScene MCP Server
CodeScene MCP Server
Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →
Give your AI the whole web as clean markdownGive your AI the whole web as clean markdown
Give your AI the whole web as clean markdown
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
CodeRabbit
CodeRabbit
AI writes the code. CodeRabbit catches the slop.
Try For Free →
belt - the only tool your agent needs
belt - the only tool your agent needs
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
inference shell
inference shell
create and run specialised agents in minutes
build now →
MCP-ready Email SendingMCP-ready Email Sending
MCP-ready Email Sending
Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →
Make your agent a DeFi expert
Make your agent a DeFi expert
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →
Capacitor - Shared memory for your team’s coding agents.
Capacitor - Shared memory for your team’s coding agents.
Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →
CodeScene MCP ServerCodeScene MCP Server
CodeScene MCP Server
Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →
Give your AI the whole web as clean markdownGive your AI the whole web as clean markdown
Give your AI the whole web as clean markdown
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
Files
SKILL.md

Select a file.

Featured
CodeRabbit
CodeRabbit
AI writes the code. CodeRabbit catches the slop.
Try For Free →
belt - the only tool your agent needs
belt - the only tool your agent needs
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
inference shell
inference shell
create and run specialised agents in minutes
build now →
MCP-ready Email SendingMCP-ready Email Sending
MCP-ready Email Sending
Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →
Make your agent a DeFi expert
Make your agent a DeFi expert
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →
Capacitor - Shared memory for your team’s coding agents.
Capacitor - Shared memory for your team’s coding agents.
Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →
CodeScene MCP ServerCodeScene MCP Server
CodeScene MCP Server
Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →
Give your AI the whole web as clean markdownGive your AI the whole web as clean markdown
Give your AI the whole web as clean markdown
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
Categories
Frontend DevelopmentSecurity
First SeenMay 16, 2026
View on GitHub

More from yaklang/hack-skills

All 102 skills →
  • Recon And Methodology2.7k
  • Business Logic Vulnerabilities2.7k
  • Ssrf Server Side Request Forgery2.7k
  • Api Recon And Docs2.7k
  • Api Auth And Jwt Abuse2.7k
  • Authbypass Authentication Flaws2.7k
  • Jwt Oauth Token Attacks2.7k
  • Websocket Security2.6k
  • Idor Broken Object Authorization2.6k
  • 401 403 Bypass Techniques2.6k
  • Waf Bypass Techniques2.6k
  • Auth Sec2.6k
  • Injection Checking2.6k
  • Kubernetes Pentesting2.6k
  • Api Authorization And Bola2.6k
  • Recon For Sec2.6k
  • Heap Exploitation2.6k
  • Traffic Analysis Pcap2.6k
  • Csrf Cross Site Request Forgery2.6k
  • Oauth Oidc Misconfiguration2.6k
  • Cors Cross Origin Misconfiguration2.6k
  • Business Logic Vuln2.6k
  • Ios Pentesting Tricks2.6k
  • Llm Prompt Injection2.6k

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Generate developer handoff specs from a design. Use when a design is ready for engineering and needs a spec sheet covering layout, design tokens, component props, interaction states, responsive breakpoints, edge cases, and animation details.
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jezweb avatar
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tw93 avatar
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vercel avatar
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