CVE-2025-12420

Critical

Description

A vulnerability has been identified in the ServiceNow AI Platform that could enable an unauthenticated user to impersonate another user and perform the operations that the impersonated user is entitled to perform. ServiceNow has addressed this vulnerability by deploying a relevant security update to  hosted instances in October 2025. Security updates have also been provided to ServiceNow self-hosted customers, partners, and hosted customers with unique configurations. Additionally, the vulnerability is addressed in the listed Store App versions. We recommend that customers promptly apply an appropriate security update or upgrade if they have not already done so.

SeverityCritical
CVSS9.8
Exploit probability—
ProductServicenow Now Assist Ai Agents
PublishedJan 12, 2026
First seenJan 12, 2026
Weakness typeCWE-250CWE-250

How to fix

Update
  • servicenow now_assist_ai_agents5.1.18, 5.2.19 or later
  • servicenow virtual_agent_api3.15.2, 4.0.4 or later

Affected products

ProductAffected versionsFixed in
servicenow now_assist_ai_agentsv < 5.1.18, 5.2.0 ≤ v < 5.2.195.1.18, 5.2.19
servicenow virtual_agent_apiv < 3.15.2, 4.0.0 ≤ v < 4.0.43.15.2, 4.0.4

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