---
sourceDocument: Brazil Platform security
sourceDocumentLink: https://www.servicenow.com/docs/r/platform-security

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil Platform security

ft:clusterId :

    - psec

bundleId :

    - psec

workflow :

    - Platform


---

# Enable CAPTCHA for external user registration

# Enable CAPTCHA for external user registration {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
The sn_ext_usr_reg.captchaEnabled controls if CAPTCHA will be validated for external user registration.
If the sn_ext_usr_reg.captchaEnabled system property is not set to the recommended value of true, then CAPTCHA isn't validated for external user registration and could lead to
automatic account creation attacks.

Ensure that the property sn_ext_usr_reg.captchaEnabled is set to true.

## More information {#sc-enable-captcha-external-user-registration__section_wc1_cqn_phc}

{#sc-enable-captcha-external-user-registration__table_ajc_b43_3kb__entry__2}

| Attribute | Description |
|-|-|
| Configuration name | sn_ext_usr_reg.captchaEnabled |
| Configuration type | System Properties (/sys_properties_list.do) |
| Data type | Boolean |
| Recommended value | true |
| Default value | true |
| Fallback value | true |
| Category | [Authentication](https://www.servicenow.com/docs/SZIHG9SfxVh2_gyMf2ec2Q "The authentication category covers the main elements of modern authentication to confirm an entity and its claims are authentic and correct, resistant to impersonation and prevent interception of passwords.") |
| Security risk | * Severity score: 3.7 * CVSS rating: Low * Security risk details: Enforcing CAPTCHA is critical to prevent bot-driven attacks and maintain the integrity of user onboarding. {#sc-enable-captcha-external-user-registration__ul_g1g_3sf_xwb} |
| Functional impact | None |
| Dependencies and prerequisites | None |
[ ]

{#sc-enable-captcha-external-user-registration__table_ajc_b43_3kb}

To learn more about adding or creating a system
property, see [Add a system property](https://www.servicenow.com/docs/access?context=t_AddAPropertyUsingSysPropsList&version=brazil&pubname=brazil-platform-administration&ft:locale=en-US).