CVE-2025-55321

Azure Monitor Log Analytics Spoofing Vulnerability

Published Oct 9, 2025 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:azure_monitor:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Description Improper neutralization of input during web page generation ('cross-site scripting') in Azure Monitor allows an authorized attacker to perform spoofing over a network. Improper neutralization of input during web page generation ('cross-site scripting') in Azure Monitor allows an unauthorized attacker to perform spoofing over a network.
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C'}

cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:azure_monitor:-:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft azure Monitor
Vendors & Products Microsoft
Microsoft azure Monitor
Type Values Removed Values Added
Description Improper neutralization of input during web page generation ('cross-site scripting') in Azure Monitor allows an authorized attacker to perform spoofing over a network.
Title Azure Monitor Log Analytics Spoofing Vulnerability
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Feb 26, 2026, 5:47 PM
Reserved
Aug 12, 2025, 8:19 PM
Status
Modified
Published
Oct 9, 2025, 9:15 PM
Modified
Oct 8, 2026, 1:10 PM