PANews reported on May 21 that, according to Blockaid, the Map Protocol/Butter Network cross-chain bridge was attacked on Ethereum and BSC. The attacker tricked the Butter Bridge V3.1 contract into directly minting approximately 1000 trillion MAPO tokens to a newly created EOA address, roughly 4.8 million times the legitimate supply of 208 million tokens. Furthermore, according to the DeFi community YAM, the attacker has currently profited approximately 52.2 ETH (about $110,000).

In response, MAP Protocol stated that the team is aware of the matter and is coordinating with external security partners to investigate and contain it. The bridge between MAPO ERC-20 and the MAPO mainnet has been suspended. Do not trade MAPO ERC-20 tokens on Uniswap at this time. Liquidity pools remain at risk while mitigation measures are in place.

Butter Network responded that ButterSwap has been suspended, and the team is coordinating an investigation with external security partners. Pending transactions will be processed once security is restored. User funds are not at risk, and all affected transactions will be processed in full upon restoration.