This blog post delves into the intricate world of Cross-Site Scripting (XSS) attacks that have plagued popular social media platforms over the past several years. Through detailed case studies on MySpace (2005), Facebook (2011), and TweetDeck (2014), it explains the causes, objectives, and solutions employed to counteract these cybersecurity threats. By tracing the evolution of these attacks, it underscores the importance of vulnerabilities in even the most renowned digital platforms and the need for robust cybersecurity measures. This narrative serves as a cautionary tale for web application developers and users alike, emphasizing the need to remain vigilance in the digital age.