Multiple Polymarket Users Report Unauthorized Asset Transfers, Suspect Front-End Attack

October 30: Polymarket trader Car posted on X that about $800,000 in assets was stolen from their Polymarket account and all positions were sold off, while a friend's account lost about $600,000; the trader urged users to lock their accounts and avoid interacting with the website for now. Several other users also reported on X and in the Polymarket Discord community that the site's front end appears to have been attacked, with assets transferred out without authorization — one user said about $200,000 was stolen, and another said they received an unauthorized withdrawal signature request on the official website. As of press time, Polymarket has not responded. In June this year, Polymarket suffered a front-end phishing attack after a third-party vendor was compromised, with about $2.94 million in user assets stolen.