Skip to content

xss #2

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Sep 22, 2024
Merged

xss #2

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 18 additions & 1 deletion fallctf-2024/src/web/web.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -125,5 +125,22 @@ If you want more resources on learning the linux command line...

+ Review our [Setup/Terminal Meeting Slides](https://sigpwny.com/meetings/fa2023/2023-09-03/)

## Cross Site Scripting (XSS)
## Cross-Site Scripting (XSS)

Cross-Site Scripting is a vulnerability that allows an attacker to execute malicious scripts on a website. This can be used to steal cookies, redirect users to malicious websites, or deface the website.

I like to think of XSS as as another type of injection attack, but instead of injecting into a database or command line, you're injecting into the website's HTML.

For example, let's say you have a website that displays a user's name on the page. If the website includes the input directly into the HTML, you can put your own HTML code in the input and have it execute on the page.

```html
<p>Welcome, <span id="username">USER INPUT</span></p>
```

If I had set `USER INPUT` to `<script>alert("Hello!")</script>`, then the website would display a popup saying "Hello!".

```html
<p>Welcome, <span id="username"><script>alert("Hello!")</script></span></p>
```

More details on XSS: https://portswigger.net/web-security/cross-site-scripting
Loading