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.

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Deploy the Patch

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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