Polymarket’s traders lost funds through a website supplier. How safe is the trading screen?

Polymarket’s October 29 breach reached traders through a compromised website supplier. Researchers found code that tried to use logged-in accounts to sell positions and move assets, exposing the trust traders place in the screen they use to manage their money. Summary Polymarket confirmed a compromised provider and restored international trading after a 1-hour halt. Researchers linked the incident to a performance-monitoring script loaded by the website. The retrieved code sought access to the trading client and signer inside an active session. A separate vendor breach in June had already prompted a promise of full refunds. The latest reimbursement pledge does not yet explain how sold positions will be valued. A trader using the name Car said approximately $800,000 had disappeared from his Polymarket account and all his positions had been sold. He said he kept trading on a separate device and avoided unfamiliar links. Other traders were reporting losses as Polymarket restricted its international exchange on October 29. The company later confirmed that a third-party provider had been compromised and promised to reimburse affected customers. The emerging technical account points to s...