Vulnerability in Servicenow Now Assist Ai Agents
CVE-2025-12420
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.532 (98.9th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.468 · newest: 0.532 · change: +0.064
Affected products
- Servicenow Now Assist Ai Agents — versions 5.0.26
- Servicenow Now Assist Ai Agents
- Servicenow Virtual Agent API — versions 0
- Servicenow Virtual Agent API
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.servicenow.com/kb (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-12420?
- CVE-2025-12420 is a critical-severity vulnerability in Servicenow Now Assist Ai Agents, classified under CWE-250. CVSS score: 9.8/10. Published 2026-01-12.
- How severe is CVE-2025-12420?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-12420 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.