yangzongzhuan RuoYi Blacklist SqlUtil.java filterKeyword sql injection

A security flaw has been discovered in yangzongzhuan RuoYi up to 4.8.1. This impacts the function filterKeyword of the file /com/ruoyi/common/utils/sql/SqlUtil.java of the component Blacklist Handler. The manipulation results in sql injection. The attack may be launched remotely. The exploit has been released to the public and may be exploited.