According to the November security report released by SlowMist, a large number of security vulnerabilities appeared in the blockchain field in November 2023. A total of 47 different events were recorded, causing an estimated huge loss of about 349 million US dollars. In November, the losses caused by only the Poloniex and Heco Bridge events reached 243 million US dollars, accounting for 69% of the total losses in November's security events. There were 24 Rug Pull events, accounting for 51% of the total number of security events. Users should fully understand the project background and team before participating and choose investments carefully. Two events involving liquidity attacks caused the project operators a loss of about 54.99 million US dollars.