On February 2, 2022, the Wormhole cross-chain bridge, which connects Solana and Ethereum, was exploited for a staggering $320M. The vulnerability was attributed to a deprecated function called 'verify_signatures' that failed to properly validate guardian signatures. This allowed the attacker to mint 120,000 wETH on Solana without depositing the corresponding ETH on Ethereum. The exploit was only made public after Jump Crypto, a prominent investor in the project, silently bailed out the affected users to the tune of $320M. The incident highlights the security risks associated with cross-chain bridges and the importance of thoroughly auditing and testing code before deployment. The use of deprecated functions and the lack of proper validation mechanisms created an environment conducive to exploitation. This incident raises questions about the security posture of cross-chain bridges and the need for more rigorous testing and validation protocols. As the DeFi ecosystem continues to expand, it is essential to prioritize security and ensure that all protocols, including cross-chain bridges, are thoroughly tested and validated to prevent such incidents. The Wormhole exploit serves as a warning to the DeFi community, emphasizing the need for robust security measures and rigorous testing to mitigate the risk of similar incidents in the future. What does this incident reveal about the current state of bridge security, and how can the industry improve its security posture to prevent such exploits?