What is CVE-2025-55321?

CVE-2025-55321 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Azure Monitor Log Analytics Spoofing Vulnerability

Which CVE IDs does CVE-2025-55321 cover?

CVE-2025-55321 covers the following CVE IDs: CVE-2025-55321. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-55321?

CVE-2025-55321 has a CVSS v3 base score of 9.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-55321?

CVE-2025-55321 affects 1 product, including: Azure Monitor.

CVE-2025-55321CriticalCVSS 9.3

Azure Monitor Log Analytics Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 9, 2025

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-55321 →

📋 Description

Improper neutralization of input during web page generation ('cross-site scripting') in Azure Monitor allows an unauthorized attacker to perform spoofing over a network.

🎯 Affected products1

Azure Monitor

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55321