Polymarket says it will repay users hit by breach, with tiers for larger losses

The story so far: Polymarket frontend hack concerns

Polymarket users reported unauthorised withdrawals and a possible frontend hack; Bubblemaps says over 700 users lost about $2.7m via a third-party provider breach. Polymarket promised full compensation, but a user says refunds require identity details and a signed contract. Polymarket now says losses under $10,000…

1. 29 Oct 202617:49 UTC

   Polymarket users report unauthorised withdrawals and possible frontend hack

   Some Polymarket users have raised concerns about unauthorised withdrawals of assets and a possible frontend hack, according to multiple media reports.

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2. 29 Oct 202618:36 UTC

   PeckShield says Polymarket UI may be compromised and warns against interacting

   PeckShield said Polymarket's user interface may have been compromised and warned users not to interact with the website.

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3. 29 Oct 202619:24 UTC

   Suspected Polymarket attacker swaps $2.65m into POL and moves 28.6m tokens

   Arkham data shows an address suspected of the Polymarket attack swapped USDC.e and USDC into POL, briefly holding about $2.65m of it, then sent out about 28.64m POL in three transfers. Hudson Rock says the address was hardcoded as a backup payout address in a wallet-draining script hosted by DebugBear.

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4. 29 Oct 202620:29 UTC

   Bubblemaps says over 700 Polymarket users lost about $2.7m in theft

   Bubblemaps says more than 700 users were affected in a Polymarket theft triggered by a breach at a third-party service provider, with about $2.7m taken and converted into POL. It says trader Car, who claimed about $800,000 was stolen, faked the theft.

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5. 30 Oct 202603:19 UTC

   X user daN'SKi says Polymarket requires signed agreement before refunds

   X user daN'SKi (@TheNotoriousSKi) says Polymarket is asking users affected by its security incident to disclose identity details and sign a legally binding contract before funds are returned, questioning whether that fits its promise of full compensation. Polymarket said on 29 Oct that a third-party provider had been breached and affected users would be fully compensated.

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6. 30 Oct 202604:24 UTC

   Polymarket says it will repay users hit by breach, with tiers for larger losses

   Polymarket's international site promised full reimbursement to traders affected after a third-party provider was breached and some user funds were stolen, and reported the matter to law enforcement. On-chain analysis showed about $2.7m moved from roughly 710 wallets; losses under $10,000 are due to be restored directly by 30 Oct, while larger losses require signing a settlement and liability waiver.

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