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CVE

CVE-2025-12420

A vulnerability has been identified in the ServiceNow AI Platform that could enable an unauthenticated user to impersona

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.

CRITICAL · CVSS 9.8 EPSS 0.0006
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-250Execution with Unnecessary Privileges
▤

Affected Products & Versions

4
servicenow now assist ai agents< 5.1.18
servicenow now assist ai agents>= 5.2.0 and < 5.2.19
servicenow virtual agent api< 3.15.2
servicenow virtual agent api>= 4.0.0 and < 4.0.4
◈

Detection Rules (IDS/IPS)

2
et-openET WEB_SPECIFIC_APPS ServiceNow BodySnatcher Virtual Agent API Authentication Bypass (CVE-2025-12420)web-application-attack
et-openET WEB_SPECIFIC_APPS ServiceNow BodySnatcher Now Assist AI Agents Authentication Bypass (CVE-2025-12420)web-application-attack
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · psirt@servicenow.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Jan 2026 · 10:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB2587329Vendor Advisory
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