Expression Language Injection
Expression Language Injection is a kind of computer attack where an attacker inserts malicious code into an application or system that uses an expression language. Expression languages are used to write expressions that are evaluated at runtime, so they can be very powerful. An attacker can take advantage of this power by inserting harmful code that could damage or compromise the system.
To give you an example, imagine a web application that allows users to search for products. The application uses an expression language to search the database for specific products that match the user’s search terms. An attacker could insert malicious code into the search bar that would execute harmful actions on the server, such as stealing sensitive information or shutting down the system.
So, in summary, Expression Language Injection is a type of computer attack where an attacker injects dangerous code into an application that uses an expression language, with the intention of causing harm.