What’s Vulnerable › Vulnerabilities

CVE-2020-0647

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-14 · updated 2026-06-17
• Weakness: CWE-346

Description

A spoofing vulnerability exists when Office Online does not validate origin in cross-origin communications correctly, aka 'Microsoft Office Online Spoofing Vulnerability'.

Affected products

• Microsoft Office Online Server: all versions
• Microsoft Office Online Server: all versions

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0647
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0647

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