code-boxx/0-JS-INJECT.MD

## 0-JS-INJECT.MD

      
    Raw
  

              0-JS-INJECT.MD
            
          
    JAVASCRIPT INJECTION EXAMPLES

https://code-boxx.com/javascript-injection-beginners/
LICENSE

Copyright by Code Boxx
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SOFTWARE.

  
## 1-console-insert.txt
STEP 0
======
Click on the test button > It should show "Hello World"


STEP 1
======
Right click on test button > Inspect
Go to the "Events Listener" tab (at bottom-right side in Chrome/Opera/Edge)
Expand on "click" > There should only be 1 click event attached to the input button
Remove it


STEP 2
======
Back to "Elements" Tab > Double click on verbose() > Change it to hijack()


STEP 3
======
Go to the console tab
Input "function hijack(){ alert("HIJACKED"); }" > Hit return
Done > Clicking on the test button now will show "HIJACKED"

## 1-page.html
<!DOCTYPE html>
<html>
  <head>
    <script>
    function verbose () { alert("Hello World!"); }
    </script>
  </head>
  <body>
    <input type="button" value="Test" onclick="verbose()">
  </body>
</html>

## 2-page.html
<!DOCTYPE html>
<html>
  <head></head>
  <body>
    <input type="text" id="txt-field" value="uvuwewewe onyetenyevwe uvwewenum osas">
  </body>
</html>

## 2-url-insert.txt
STEP 1:
For testing, enter -
javascript:alert("Hi!");
into the address bar.

STEP 2:
Then try this -
javascript:alert(document.getElementById("txt-field").value);
This should give you "uvuwewewe onyetenyevwe uvwewenum osas" or whatever is in the text box.

## 3-xss.html
<!DOCTYPE html>
<html>
  <head></head>
  <body>
    <h1>LE NOOB WEBPAGE</h1>
    <p>
      Lorem ipsum dolor sit amet, consectetur adipiscing elit.
    </p>
    <h3>COMMENTS</h3>
    <div>
      Well done! <script>alert("HAHA!");</script>
    </div>
  </body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<script>
	function verbose () { alert("Hello World!"); }
	</script>
	</head>
	<body>
	<input type="button" value="Test" onclick="verbose()">
	</body>
	</html>
	<!DOCTYPE html>
	<html>
	<head></head>
	<body>
	<input type="text" id="txt-field" value="uvuwewewe onyetenyevwe uvwewenum osas">
	</body>
	</html>