If you are using Apache Unomi, it is better to check your system if any vulnerability exists.
There is a malicious injection attack to the /context.json public endpoint. It is fixed in 1.5.1 but new attack method was found. It is secure to use version 1.5.2 of Apache Unomi for now.
It is highly recommended to upgrade to the latest available version of the 1.5.x release to fix this problem.