We break down the most critical DeFi exploits of 2025 so far, what went wrong, and what lessons must be internalized. Whether you’re a protocol founder, security lead, or community contributor this is for you.

If there’s one lesson from the last 3 years — and especially from Q1 2025 — it’s this: security can’t be a checkbox. Not anymore. Attackers no longer limit themselves to code. They target supply chains. They phish keys. They hijack admin roles. And they move faster than ever before.