Cross-Site Scripting Vulnerability in Microsoft Office Out-of-Box Experience
CVE-2025-64677

8.2HIGH

Key Information:

Vendor

Microsoft
Status
Office Out-of-box Experience
Vendor
CVE Published:
18 December 2025

What is CVE-2025-64677?

The vulnerability in the Office Out-of-Box Experience allows attackers to exploit improper input handling during web page generation. This could lead to unauthorized access and spoofing over a network, posing significant security risks to users. Attackers can manipulate the application's response to execute malicious scripts within the context of the user's browser.

Affected Version(s)

Office Out-of-Box Experience Unknown

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-64677 : Cross-Site Scripting Vulnerability in Microsoft Office Out-of-Box Experience