On May 2025, YDT was exploited in a business logic flaw, resulting in approximately $41K in losses. That makes the YDT exploit the 281st largest DeFi incident out of 690 documented in our archive.
Attack Mechanics: How the YDT Business Logic Flaw Played Out
Exploit Class Applied to YDT
The YDT incident on May 26, 2025 is classified as a Business Logic Flaw. A business-logic bug in the contract — such as an incorrect formula or missing state update — lets the attacker withdraw more than their share. In the full archive, YDT is 1 of 144 documented business logic flaw incidents.
YDT in Context
At $41K, the YDT exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — – EulerFinance (2023) at $200M.
Prior Business Logic Flaw Before YDT
The nearest business logic flaw incident before YDT was Laundromat, 48 days earlier on April 8, 2025 ($1.5K lost). The same exploit class surfaced again within the business logic flaw attack surface.
YDT Vulnerability Signature
The primary source categorises the YDT exploit specifically as “Logic Flaw”. This narrower label is entity-specific: it reflects how the YDT contract failed, rather than the broad business logic flaw pattern alone.
Impact & Recovery for YDT
YDT Loss Figure
The YDT exploit caused $41,000 in losses — a minor (<$1M) incident and the 43rd largest of 96 documented in 2025.
Where YDT Sits Among Business Logic Flaw Attacks
Ranked by loss size, YDT is the 53rd largest of 144 business logic flaw incidents documented. That puts the YDT loss below the class average of $6.08M.
Timeline Since the YDT Incident
The YDT exploit occurred 11 months ago (323 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.
Primary Reference for YDT
Public post-mortem / on-chain analysis for the YDT incident: view source.
FAQ
How much did YDT lose?
The YDT exploit in May 2025 resulted in $41,000 in losses — the 43rd largest of 96 DeFi incidents that year.
When did the YDT hack happen?
The YDT exploit was recorded on May 26, 2025 — 323 days ago.
What type of exploit hit YDT?
The YDT incident is classified as a Business Logic Flaw. A business-logic bug in the contract — such as an incorrect formula or missing state update — lets the attacker withdraw more than their share.
How common is the Business Logic Flaw pattern seen at YDT?
Our archive contains 144 documented business logic flaw incidents. The YDT incident is one of them.
How does YDT compare to the largest Business Logic Flaw attack?
The largest business logic flaw incident in our archive is – EulerFinance (2023) at $200M. The YDT loss is $41K.
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