CVE-2020-0891

Name: CVE-2020-0891
Creator: NVD / NIST
Published: 2020-03-12T16:15:20.643+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2020-0891 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. This vulnerability is caused when SharePoint Server does not properly sanitize a specially crafted request to an affected SharePoint server.An authenticated attacker could exploit this vulnerability by sending a specially crafted request to an affected SharePoint server, aka 'Microsoft SharePoint Reflective XSS Vulnerability'. This CVE ID is unique from CVE-2020-0795.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

This vulnerability is caused when SharePoint Server does not properly sanitize a specially crafted request to an affected SharePoint server.An authenticated attacker could exploit this vulnerability by sending a specially crafted request to an affected SharePoint server, aka 'Microsoft SharePoint Reflective XSS Vulnerability'. This CVE ID is unique from CVE-2020-0795.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.51%

71.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Sharepoint Enterprise Server	2016	—
Microsoft	Sharepoint Foundation	2010	Sp2
Microsoft	Sharepoint Foundation	2013	Sp1
Microsoft	Sharepoint Server	2019	—

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0891Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0891Patch, Vendor Advisory

Timeline

Published: Mar 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-0891?

How severe is CVE-2020-0891?

CVE-2020-0891 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2020-0891?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-0891?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST