Getting number of random log offs

I am having an Issue with random log offs.   When i get a report of the log off, i look back thru jas server they were logged on to.  I can see which one because even tho it tells them they are logged off, that session stays open in Server Manager.  This is the error I see:

23 Aug 2019 07:19:57,351 [SEVERE]  - [RUNTIME]         ***Security Alert***

Malicious script attack has been detected. The user session will be invalidated.

The parameter Name is:e1.service. The scripts are:ResourceCanonicalsJS"></script><script type="text/javascript" language="JavaScript" src="/jde/share/js/e1.js"></script><script>_e1URLFactory = new E1URLFactory('Servlet','/jde/','/jde/URLBuilderService.mafService?e1UserActInfo=false