I have an iframe with different source origin, is there a way to use postMessage to change value of an input inside this same iframe knowing that i have any control on it's source.?
I tried to inject a script that listen for the postMessage inside the iframe, but I am always blocked by origin policy.
Hope I am clear, please any help or clarification, I tried several tricks but witout any results.
Thank you.
The short answer is no, the security is place to stop you hacking someone else page.
Their is a longer answer involving proxy servers, but then you are properly breaking a few of your countries laws around copyright and computer miss use.