[Alpha.Stallion997]

Can I steal data or change the data of a website with XSS vulnerability?
Please answer. Thanks.

[F4K3R]

u can add a cookie logger & get the cookies ;)

[Сlassy]

You can inject javascript with XSS. Dont know excatly what kind of thing you are trying to do right now, but I think you need admin login details. Inject a cookie logger on a site and you will someday get admin login.

[kirtura]

better to get some beginner guide to safely execute the protocol

[raveal]

shooot me dm i think i can help

[Sitrep]

Depends on the vulnerability, but you can for example steal session cookies with XSS if the site is vulnerable.

[garkolym]

You can inject an iFrame of another page (It must be on the same origin) and then theft the csrf token or take actions, like change email and submit (Account takeover) :)

If its on the same page, you have access to the document object and can do anything

Cookie Stealing ... Too mainstream