Vulnerability · Published Jan 12, 2026 · Assigned by SN
CVE-2025-12420Unauthenticated Privilege Escalation in ServiceNow AI Platform
Critical 9.3
In plain English
A critical-severity security flaw in Now Assist AI Agents from ServiceNow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 53.2% (higher than 99% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ServiceNow | Now Assist AI Agents | 5.0.26 – through 5.1.175.0.26 – through 5.2.18 |
| ServiceNow | Virtual Agent API | 0 – before 3.15.20 – before 4.0.4 |
Weakness: CWE-250 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/S:N/AU:Y/R:U/V:C/RE:H/U:Amber