Hack history / 2022 / Hack or exploit
Quixotic
Hack or exploit on Jul 1, 2022 · Signature Verification Flaw
ATTACK TX CONFIRMED ON CHAINSOURCES AGREE ON DATE AND LOSS · 4 SOURCES
Lost
$100K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,727
among thefts by dollars lost
What happened
On July 1, 2022, Quixotic NFT marketplace on Optimism was exploited due to a missing signature check in the fillSellOrder() function. The attacker minted NFTs, listed them for sale, and used the vulnerability to swap any victim's wallet tokens for the attacker's NFTs. The team paused all activity and reimbursed affected users.
Details
- Date
- Jul 1, 2022
- Kind
- Hack or exploit
- Method
- Signature Verification Flaw
- How in
- Smart contract bug
- Target
- NFTfi
- Chains
- Optimism, Ethereum
After the theft
- Victims reimbursed
- yes, amount not stated
“The team paused all activity and reimbursed affected users.” (DefiLlama)
Cite this page
SwanBluechip, "Quixotic hack, Jul 1, 2022: $100K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htfbabb2188f/ (data as of 2026-10-31).