Prompt injection
When a user enters a prompt into a large language model like ChatGPT, the creator of the language model, like OpenAI, often customizes the response of the language model by concatenating their own prompt onto the user's prompt. The creator's prompt is like a set of instructions that is concatenated before the start of the user's prompt and is hidden from the user. The creator's prompt provides context like tone, point of view, objective, length etc.
Prompt injection is when the user's prompt changes the creator's prompt, make the language model ignore the creator's prompt or leaks the creator's prompt.