AppSecMaster is an interactive platform that uses real-world challenges to teach application security. Developers, penetration testers, and security teams practice secure coding, perform source code reviews, and tackle OWASP Top 10 vulnerabilities through hands-on CTF-style exercises.
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  • CVE-2026-44578 PoC Understanding WebSocket SSRF
    Understand how CVE-2026-44578 affects WebSocket upgrade request handling in self-hosted Next.js deployments. Explore the SSRF vulnerability, proof of concept research, attack paths, and possible exposure of internal endpoints. This technical overview explains the security issue, affected Next.js releases, and defensive measures developers can use to validate request routing, restrict outbound connections, and protect sensitive infrastructure.
    https://www.appsecmaster.net/blog/cve-2026-44578-nextjs-websocket-ssrf-vulnerability/
    CVE-2026-44578 PoC Understanding WebSocket SSRF Understand how CVE-2026-44578 affects WebSocket upgrade request handling in self-hosted Next.js deployments. Explore the SSRF vulnerability, proof of concept research, attack paths, and possible exposure of internal endpoints. This technical overview explains the security issue, affected Next.js releases, and defensive measures developers can use to validate request routing, restrict outbound connections, and protect sensitive infrastructure. https://www.appsecmaster.net/blog/cve-2026-44578-nextjs-websocket-ssrf-vulnerability/
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  • Server Side Request Forgery Complete Security Guide
    Learn what Server Side Request Forgery (SSRF) is, how it works, and why it poses a serious threat to web application security. Explore common SSRF attack types, real world examples, security risks, and practical prevention methods. Discover how attackers exploit server side requests to access internal systems, cloud metadata services, and sensitive information. Understand SSRF detection techniques, secure coding practices and effective mitigation strategies to protect your applications, APIs and cloud infrastructure against unauthorized requests.
    https://www.appsecmaster.net/blog/server-side-request-forgery/
    Server Side Request Forgery Complete Security Guide Learn what Server Side Request Forgery (SSRF) is, how it works, and why it poses a serious threat to web application security. Explore common SSRF attack types, real world examples, security risks, and practical prevention methods. Discover how attackers exploit server side requests to access internal systems, cloud metadata services, and sensitive information. Understand SSRF detection techniques, secure coding practices and effective mitigation strategies to protect your applications, APIs and cloud infrastructure against unauthorized requests. https://www.appsecmaster.net/blog/server-side-request-forgery/
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  • Free Vulnerable Web Apps Beginner Security Lab Plan
    The best OWASP vulnerable web applications for beginners are the ones that match your current stage, not the ones with the longest challenge list. Start with a small server rendered app to learn core flaws, move to a curriculumstyle app to understand root causes, then graduate to a modern singlepage shop and finally to unguided exercises. All of the common training targets are free and open...
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