Server-Side Template Injection (SSTI) is a high-severity vulnerability that occurs when an application embeds user input into a web template in an unsafe manner. While templates are designed to generate dynamic web pages by combining static layouts with variable data, improper handling of user-supplied strings can allow an attacker to "inject" and execute their own code on the server. 2. How Vulnerabilities Arise Modern web applications use template engines like FreeMarker
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