... and use alert(document.domain) or alert(window.origin) instead. Blog post: https://liveoverflow.com/do-not-use-alert-1-in-xss/ Sponsored by Google for their Bug Hunter University: https://bughunters.google.com/learn/invalid-reports/web-platform/xss/5108550411747328 00:00 - Intro 00:47 - Why Do We Use Alert(1) for XSS? 02:25 - alert(1) Popup is NOT Proof of a Vulnerability! 03:07 - Invalid XSS Example 1 on Blogger 04:43 - Sandbox Subdomains 06:27 - Sandboxed iframes 08:29 - Invalid XSS Example 2 on Google Sites 09:50 - Why Should You Care About Invalid XSS Issues? 10:55 - Summary 11:55 - Outro =[ ❤️ Support ]= → per Video: https://www.patreon.com/join/liveoverflow → per Month: null =[ 🐕 Social ]= → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/