Server-Side Template Injection (SSTI)
Server-Side Template Injection (SSTI) is a type of vulnerability that attackers can exploit to take control of a web application. It works like this: some web applications use templates to generate web pages. A template is basically a file that contains code and predetermined structures that are filled in with user data to create a final page. SSTI happens when an attacker is able to inject malicious code into a template file. If the web application doesn’t validate the data properly, then the attacker’s code can be executed on the server, which can allow them to take control of it.
This can be a serious problem because attackers can use this kind of vulnerability to steal data, manipulate web pages, or even take complete control of a server. To prevent SSTI attacks, web developers need to be very careful about how they handle user data. They should validate all input and sanitize it to remove any potentially harmful code.
So, in summary, SSTI is a vulnerability that attackers can exploit to take control of a web application by injecting malicious code into templates. To prevent SSTI, web developers should validate and sanitize all user input.