A Cross-Site Scripting Attack Protection Framework Based on Managed Proxy

Cross-Site Scripting (XSS) vulnerabilities continue to pose a formidable challenge in the realm of web application security due to their prevalence. Despite the development of various defense mechanisms, including input validation techniques and code differentiation strategies, these solutions have struggled to achieve broad adoption in real-world environments due to persistent issues such as unreliable detection, high computational overhead, scalability limitations, and compatibility concerns. This paper introduces a novel managed proxy-based framework for XSS defense, positioned strategically between the web browser and the web server. This framework employs a tag-based XSS protection mechanism alongside a defense-in-depth strategy, providing robust protection not only against XSS attacks but also against other web threats. Furthermore, the framework integrates advanced web front-end hardening techniques to significantly complicate the exploitation of potential vulnerabilities. Comprehensive practical evaluations indicate that the proposed framework is both flexible and effective, demonstrating outstanding performance across multiple dimensions.