Polymarket Hack

TOTAL LOST $500K
Low Phishing ethereum polygon

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain ethereum 2 chains affected
Recovered - No recovery reported
All-Time Rank #1218 By amount stolen
Year 2025 Incident year

Incident Report

Protocol / Project Polymarket
Date of Incident
Affected Chain(s) ethereum polygon
Attack Technique Phishing
Classification Social Engineering

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of phishing and Solidity and EVM internals
Capital Required Seed capital to cover gas and initial position setup
On-Chain Access Ability to interact with ethereum, polygon smart contracts and deploy a custom exploit contract
Protocol Analysis Identification of the exploitable vulnerability in Polymarket's contract logic - root cause: social engineering
Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block
Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely, with a thorough Phishing audit checklist and test coverage

If you're auditing a protocol with similar architecture to Polymarket, these are the critical security checks that could have prevented this incident (November 2025).

  • Verify all logic paths related to Phishing are guarded by proper access controls and input validation - see the Phishing Attacks attack class for patterns
  • Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Related Attack Classes

The technique used in this hack maps to these vulnerability classes in our security curriculum:

See all Phishing Attacks examples →

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