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CVE-2025-62459— Microsoft Defender Portal Spoofing Vulnerability

Quick assessment

Affected
Microsoft Microsoft 365 Defender Portal
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Defender是美国微软（Microsoft）公司的一款威胁防护软件。 Microsoft Defender存在跨站脚本漏洞，该漏洞源于门户欺骗漏洞。

CVSS 8.3 · High EPSS 0.31% · P21

Possible ATT&CK Techniques 1 AI

T1134 · Access Token Manipulation
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I. Basic Information for CVE-2025-62459

Vulnerability Information
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Vulnerability Title
Microsoft Defender Portal Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft Defender Portal Spoofing Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Defender 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Defender是美国微软（Microsoft）公司的一款威胁防护软件。 Microsoft Defender存在跨站脚本漏洞，该漏洞源于门户欺骗漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft 365 Defender Portal - -

II. Public POCs for CVE-2025-62459

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III. Intelligence Information for CVE-2025-62459

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Same Patch Batch · Microsoft · 2025-11-20 · 6 CVEs total

CVE-2025-49752 10.0 CRITICAL Azure Bastion Elevation of Privilege Vulnerability
CVE-2025-59245 9.8 CRITICAL Microsoft SharePoint Online Elevation of Privilege Vulnerability
CVE-2025-64655 8.8 HIGH Dynamics OmniChannel SDK Storage Containers Elevation of Privilege Vulnerability
CVE-2025-62207 8.6 HIGH Azure Monitor Elevation of Privilege Vulnerability
CVE-2025-64660 8.0 HIGH GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same vendor: Microsoft
Same weakness: CWE-79

V. Comments for CVE-2025-62459

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