A security flaw has been discovered in Dromara MaxKey up to 3.5.13. Affected by this issue is the function StrUtils.checkSqlInjection of the file StrUtils.java. Performing a manipulation of the argument filtersfields results in sql injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.