DOM-based XSS vulnerabilities usually arise when JavaScript takes data from an attacker-controllable source, such as the URL, and passes it to a sink that supports dynamic code execution, such as eval () or innerHTML. How to change the cursor into a hand when a user hovers over a list item? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, this is forbidden for sensible security reasons, http://ox86.tumblr.com/post/17652823257/cross-domain-ajax-for-your-api-endpoints, How a top-ranked engineering school reimagined CS curriculum (Ep. What is this brick with a round back and a stud on the side used for? Does the 500-table limit still apply to the latest version of Cassandra? Nolan-esque experience, 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. You can just style it in your parent Style sheets also. This solution is not a way to dammage Google service or to trick people in a way to exploit their weakness. iframenode.postMessage('h2{color:red;}','*'); * is to send this message irrespective of what domain it is in iframe. Counting and finding real solutions of an equation. Thanks for contributing an answer to Stack Overflow! Inject stylesheet into Looker IFrame | Looker Community ', referring to the nuclear power plant in Ignalina, mean? The postMessage input and output formats are described next. The response that is sent to the source frame using postMessage contains most standard XHR object keys. Can the game be left in an invalid state if all state-based actions are replaced? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. In the same line of thinking but more succinct: The snippet