html-injection-testing
Identify and exploit HTML injection vulnerabilities that allow attackers to inject malicious HTML content into web applications. This vulnerability enables attackers to modify page appearance, create phishing pages, and steal user credentials through injected forms.
Profile →npx skills add sickn33/agentic-awesome-skills --skill html-injection-testing --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
> **⚠️ AUTHORIZED USE ONLY** > This skill is for educational purposes or authorized security assessments only. > You must have explicit, written permission from the system owner before using this tool. > Misuse of this tool is illegal and strictly prohibited. > **Mandatory confirmation gate** > Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target: > 1. Ask the user to state the exact target URL, IP, account, or resource. > 2. Ask the user to confirm written authorization and the permitted scope. > 3. Show the exact command(s) and explain their expected effect. > 4. Wait for explicit confirmation in the current conversation. > > Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab. > AUTHORIZED USE ONLY: Use this skill only for authorized security assessments, defensive validation, or controlled educational environments. # HTML Injection Testing ## Purpose Identify and exploit HTML injection vulnerabilities that allow attackers to inject malicious HTML content into web applications. This vulnerability enables attackers t
- Purpose
- Prerequisites
- Required Tools
- Required Knowledge
- Outputs and Deliverables
- Core Workflow
- Phase 1: Understanding HTML Injection
- Phase 2: Identifying Injection Points
- Phase 3: Basic HTML Injection Testing
- Phase 4: Types of HTML Injection
- Phase 5: Phishing Attack Construction
- Phase 6: Defacement Payloads
- Phase 7: Advanced Injection Techniques
- Phase 8: Bypass Techniques
Test basic injection curl "http://target.com/search?q=<h1>Test</h1>" Check if HTML renders in response curl -s "http://target.com/search?q=<b>Bold</b>" | grep -i "bold" Test in URL-encoded form curl "http://target.com/search?q=%3Ch1%3ETest%3C%2Fh1%3E" POST injection test curl -X POST -d "comment=<div style='color:red'>Malicious Content</div>" \ Form field injection curl -X POST -d "name=<script>alert(1)</script>&email=test@test.com" \
What does the html-injection-testing skill do?
Identify and exploit HTML injection vulnerabilities that allow attackers to inject malicious HTML content into web applications. This vulnerability enables attackers to modify page appearance, create phishing pages, and steal user credentials through injected forms.
How do I install it?
Run `npx skills add sickn33/agentic-awesome-skills --skill html-injection-testing --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From sickn33/agentic-awesome-skills, a repository with 44,414 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.