Hack history / 2023 / Hack or exploit
El Dorado Exchange
Hack or exploit on May 30, 2023 · Swap Logic Flaw
IN REVIEWSOURCES DISAGREE ON DATE OR LOSS · 2 SOURCES
Lost
$120K
sources: $120K to $580K
Returned
none listed
as the sources state it
Rank
#1,653
among thefts by dollars lost
What happened
An attacker exploited a closed-source Oracle contract in El Dorado Exchange to manipulate prices and liquidate positions. The attacker extracted approximately $520K but was identified as a white-hat security researcher exposing a price manipulation fraud scheme. After the team admitted code vulnerabilities, the attacker returned over $400K.
In review: sources disagree on the loss.
Details
- Date
- May 30, 2023
- Kind
- Hack or exploit
- Method
- Swap Logic Flaw
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Arbitrum, Ethereum
After the theft
- Returned by the attacker
- yes, amount not stated
“After the team admitted code vulnerabilities, the attacker returned over $400K.” (DefiLlama)
Reported by
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Cite this page
SwanBluechip, "El Dorado Exchange hack, May 30, 2023: $120K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht4dfe0a5ea7/ (data as of 2026-10-31).