Disable AJAXEvaluate

reference brazil Updated Sep 10, 2026 1 min read sc-disable-ajaxevaluate.md

Use the glide.script.allow.ajaxevaluate to protect the system API from vulnerabilities of Client script execution through AJAX calls.

The AjaxEvaluator processor executes these scripts in sandbox however there are several additional properties which can allow the scope of activities in the sandbox to expand or be turned off entirely. In a worst case scenario a user can easily execute scripts as an admin privilege.

Ensure that the glide.script.allow.ajaxevaluate system property is set to false.

Elevation to the security_admin role is required to edit the property.

Warning: This is a safe harbor property, meaning the value can't be altered once it's changed. It is non-revertible.

More information

Attribute	Description
Configuration name	glide.script.allow.ajaxevaluate
Configuration type	System Properties (/sys_properties_list.do)
Data type	Boolean
Recommended value	false
Default value	false
Fallback value	false
Category	Validation, sanitization, and encoding
Security risk	Severity score: 7.3 CVSS rating: High Security risk details: If this property is not set to false, then the system API can be vulnerable to client script execution through AJAX calls.
Functional impact	None
Dependencies and prerequisites	None

**Parent Topic:**[Validation, sanitization, and encoding](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/platform-security/instance-security-hardening-settings/validation-sanitization-encoding.md)

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---
title: Disable AJAXEvaluate
description: Use the glide.script.allow.ajaxevaluate to protect the system API from vulnerabilities of Client script execution through AJAX calls.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/platform-security/instance-security-hardening-settings/sc-disable-ajaxevaluate.html
release: brazil
product: Instance Security Hardening Settings
classification: instance-security-hardening-settings
topic_type: reference
last_updated: "2026-09-10"
reading_time_minutes: 1
breadcrumb: [Validation, sanitization, and encoding, Hardening settings, Platform Security]
---

# Disable AJAXEvaluate

Use the **glide.script.allow.ajaxevaluate** to protect the system API from vulnerabilities of Client script execution through AJAX calls.

The AjaxEvaluator processor executes these scripts in sandbox however there are several additional properties which can allow the scope of activities in the sandbox to expand or be turned off entirely. In a worst case scenario a user can easily execute scripts as an admin privilege.

Ensure that the **glide.script.allow.ajaxevaluate** system property is set to **false**.

Elevation to the security\_admin role is required to edit the property.

**Warning:** This is a safe harbor property, meaning the value can't be altered once it's changed. It is non-revertible.

## More information

<table id="table_ajc_b43_3kb"><thead><tr><th>

Attribute

</th><th>

Description

</th></tr></thead><tbody><tr><td>

Configuration name

</td><td>

**glide.script.allow.ajaxevaluate**

</td></tr><tr><td>

Configuration type

</td><td>

System Properties \(/sys\_properties\_list.do\)

</td></tr><tr><td>

Data type

</td><td>

Boolean

</td></tr><tr><td>

Recommended value

</td><td>

false

</td></tr><tr><td>

Default value

</td><td>

false

</td></tr><tr><td>

Fallback value

</td><td>

false

</td></tr><tr><td>

Category

</td><td>

[Validation, sanitization, and encoding](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/platform-security/instance-security-hardening-settings/validation-sanitization-encoding.md)

</td></tr><tr><td>

Security risk

</td><td>

-   Severity score: 7.3
-   CVSS rating: High
-   Security risk details: If this property is not set to **false**, then the system API can be vulnerable to client script execution through AJAX calls.

</td></tr><tr><td>

Functional impact

</td><td>

None

</td></tr><tr><td>

Dependencies and prerequisites

</td><td>

None

</td></tr></tbody>
</table>**Parent Topic:**[Validation, sanitization, and encoding](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/platform-security/instance-security-hardening-settings/validation-sanitization-encoding.md)