Use the glide.script.use.sandbox property to enable script sandboxing.

There are two cases in the Now Platform that enable the client to send scripts to the server for evaluation:
Filters or queries
It is legal to send a filter to the server such as assigned_to=JavaScript:getMyGroups().
System API
API call enables the client to run arbitrary scripts on the server and receive a response.
If you enable script sandboxing, the script being evaluated at either of these two entry points runs in a sandbox with reduced rights, with the following characteristics:
  • Only those business rules marked client callable are available within the sandbox.
  • Only script includes marked client callable are available within the sandbox.
  • Certain API calls (largely, but not entirely, limited to ones dealing with direct DB access are not allowed.
  • You can't insert, update, or delete data from within the sandbox. For example, any calls to current.update(), are ignored. If you run the Now Platform without enabling script sandboxing, none of these restrictions apply.

More information

AttributeDescription
Property name glide.script.use.sandbox
Configuration type System Properties (/sys_properties_list.do)
Configure in Instance Security Center Yes
Purpose Enforces validation for the client-side JavaScript queries that are launched against the platform
Recommended value true
Functional ImpactThis remediation enforces validation for the client-side JavaScript queries that are launched against the Now Platform. There is a potential impact if customer has customizations that include hard-coded JavaScript queries to perform CRUD operations.
Security risk (High) The Now Platform provides wide variety of features and functionality through JavaScript queries. However, without appropriate authorization and validation, there is a potential for an attacker to perform unauthorized operations against the platform.
References Configuring Script sandbox property
glide.script.use.sandbox belongs to the same family of properties that secure and restrict execution of scripts originating from the client:

To learn more about adding or creating a system property, see Add a system property.