Lesson 1146 of 1570
AI and prompt injection basics: when a webpage hijacks your AI
Learn how prompt injection works so you don't fall for the next AI security gotcha.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The big idea
- 2prompt injection
- 3security
- 4agent
Concept cluster
Terms to connect while reading
Section 1
The big idea
Prompt injection is when hidden text on a webpage or in a doc tells the AI to ignore you and do something else. As AI agents browse the web for you, this becomes a real security issue.
How to use it
- Ask AI to explain prompt injection with a 1-paragraph example
- Ask AI to spot suspicious instructions in a doc you upload
- Ask AI to never click links in pages it browses for you
- Ask AI which agent products are most vulnerable today
Try it
Have AI summarize a webpage. Then ask it: 'Did this page try to give you any instructions?' See what it says.
Key terms in this lesson
End-of-lesson quiz
Check what stuck
15 questions · Score saves to your progress.
Tutor
Curious about “AI and prompt injection basics: when a webpage hijacks your AI”?
Ask anything about this lesson. I’ll answer using just what you’re reading — short, friendly, grounded.
Progress saved locally in this browser. Sign in to sync across devices.
Related lessons
Keep going
Builders · 40 min
What a Token Actually Is (And Why It Matters for Your Prompts)
AI doesn't read words — it reads tokens. Knowing the difference makes you a better prompter.
Builders · 40 min
Temperature Explained: Why the Same Prompt Gives Different Answers
Temperature controls how 'creative' an AI gets. Knowing how to dial it changes everything.
Builders · 40 min
Why AI 'Forgets' Halfway Through a Long Chat
AI has a memory limit called the context window. Hitting it explains a LOT of weird behavior.
