CVE-2025-55321: Microsoft Azure Monitor

Critical severity, CVSS 9.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Microsoft Azure Monitor: affected versions not specified

Published 2025-10-09. Last modified 2026-10-08.