Arbitrum Based Jimbos Protocol Scurries for Revival After $7M Exploit

Version 2 of Jimbos protocol was attacked over the weekend for $7.3 million, just days after going live.

AccessTimeIconMay 29, 2023 at 4:46 a.m. UTC
Updated May 29, 2023 at 6:33 a.m. UTC

Developers behind the Arbitrum-based Jimbos Protocol are gauging the best way for the project to move forward after its version 2 (V2) faced a $7.5 million exploit over the weekend.

Jimbos said it was working with security researchers to reclaim lost funds – the same people who’ve previously helped Euler Finance recover over $200 million – and added that they would contact law enforcement by 4 P.M. UTC on Monday if the attacker failed to return the money.

Jimbos lost 4,090 ether (ETH) late on Saturday, which security analysts blamed on the lack of slippage control in the main contract. This allowed the yet-unidentified attackers to take out a $5.9 million flash loan, manipulate the prices of jimbo (JIMBO), and walk out with treasury funds.

The protocol planned to issue a semi-stable token backed by a basket of crypto tokens, alluring traders to this concept as similar projects have seen brief success.

Flash loans are a popular way for attackers to gain funds to conduct exploits on decentralized finance (DeFi) systems. The loans allow traders to borrow unsecured funds from lenders using smart contracts instead of third parties.

These do not require any collateral because the contract considers the transaction complete only when the borrower repays the lender – meaning a borrower defaulting on a flash loan would cause the smart contract to cancel the transaction, and the money would be returned to the lender.

Meanwhile, JIMBO, its token, traded at nearly 18 cents on Monday, slightly recovering in Asian morning hours as developers floated their protective plans.

Edited by Sam Reynolds.


Please note that our privacy policy, terms of use, cookies, and do not sell my personal information has been updated.

The leader in news and information on cryptocurrency, digital assets and the future of money, CoinDesk is a media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. CoinDesk is an independent operating subsidiary of Digital Currency Group, which invests in cryptocurrencies and blockchain startups. As part of their compensation, certain CoinDesk employees, including editorial employees, may receive exposure to DCG equity in the form of stock appreciation rights, which vest over a multi-year period. CoinDesk journalists are not allowed to purchase stock outright in DCG.

Shaurya Malwa

Shaurya is the Deputy Managing Editor for the Data & Tokens team, focusing on decentralized finance, markets, on-chain data, and governance across all major and minor blockchains.

Learn more about Consensus 2024, CoinDesk’s longest-running and most influential event that brings together all sides of crypto, blockchain and Web3. Head to to register and buy your pass now.

Read more about