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Polymarket frontend hacked, trading halted

Polymarket says a compromised third-party provider affected its international platform; it fixed the issue, referred it to law enforcement, will make users whole, and halted trading.

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Key points

  • Polymarket temporarily halted trading out of an abundance of caution, then said trading is now fully back online.
  • Polymarket said it will fully reimburse all affected traders and that anyone impacted will be made whole.
  • @cz_binance said the issue appears to be an injection attack on the front end, injecting incorrect tx while showing a valid tx for the user to sign.

Key points and the reaction summary are written by AI from the posts on this page. Check the original post. How we use AI

Original post

Polymarket Traders @PolymarketTrade 50.3K followers

We've identified & fixed an issue impacting our international platform, Polymarket⁠.com. One of our 3rd party providers was compromised, and we have referred this to relevant law enforcement. Anyone who has been impacted will be made whole. Out of an abundance of caution, we have temporarily halted trading & are working to bring the platform back online.
1,061likes 184reposts 172replies 98.8Kviews

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What others are saying

4 more
  1. Aggr News @AggrNews 1,475

    Aggr News reports Polymarket users claim the frontend may be compromised and assets are being withdrawn without permission.

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  2. aaalex.hl @aaalex 823

    User warns Polymarket's frontend was injected with a malicious script selling positions and draining funds, urging revocation.

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  3. CZ 🔶 BNB @cz_binance 465

    CZ says the Polymarket incident appears to be a frontend injection attack showing valid transactions while injecting incorrect ones.

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  4. Polymarket says trading is fully back online and it will fully reimburse all affected traders.

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Top replies on X

Reaction on X: The top replies mostly press Polymarket to name the compromised third party, with several asking why the provider has not been identified. One reply jokes about the stress it caused, and the original poster responds that the platform is coming back online, with trading resuming at approximately 3pm ET.

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From @PolymarketTrade, @aaalex, @holy_moses7 and others. Spam removed, with English and Chinese translations.

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