What is CVE-2020-0695?

CVE-2020-0695 is a medium-severity vulnerability in Microsoft Office Online Server, classified under Origin Validation Error. CVSS score: 5.4/10. Published 2020-02-11.

How severe is CVE-2020-0695?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Microsoft Office Online Server

CVE-2020-0695

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

Published 2020-02-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Microsoft Office Online Server — versions unspecified
Microsoft Office Online Server

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0695 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-0695?: CVE-2020-0695 is a medium-severity vulnerability in Microsoft Office Online Server, classified under Origin Validation Error. CVSS score: 5.4/10. Published 2020-02-11.
How severe is CVE-2020-0695?: Medium severity. CVSS v3 base score is 5.4 out of 10.