Cross-Site Scripting Vulnerability in Azure Monitor by Microsoft
CVE-2025-55321

9.3CRITICAL

Key Information:

Vendor

Microsoft
Status
Azure Monitor
Vendor
CVE Published:
9 October 2025

What is CVE-2025-55321?

A cross-site scripting vulnerability exists in Azure Monitor that allows an authorized attacker to execute spoofing attacks over a network by improperly neutralizing input during web page generation. This flaw could lead to unauthorized content being presented to users, potentially compromising user information and interactive session security.

Affected Version(s)

Azure Monitor Unknown

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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