CVE-2019-0557

Name: CVE-2019-0557
Creator: NVD / NIST
Published: 2019-01-08T21:29:01.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 2.07%

Last modified Jun 17, 2026

CVE-2019-0557 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server, aka "Microsoft Office SharePoint XSS Vulnerability." This affects Microsoft SharePoint. This CVE ID is unique from CVE-2019-0556, CVE-2019-0558.. EPSS estimates a 2.07% chance of exploitation in the next 30 days.

Description

A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server, aka "Microsoft Office SharePoint XSS Vulnerability." This affects Microsoft SharePoint. This CVE ID is unique from CVE-2019-0556, CVE-2019-0558.

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

2.07%

79.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Microsoft	Sharepoint Server	2016

References

http://www.securityfocus.com/bid/106388Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0557Patch, Vendor Advisory
http://www.securityfocus.com/bid/106388Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0557Patch, Vendor Advisory

Timeline

Published: Jan 8, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-0557?

How severe is CVE-2019-0557?

CVE-2019-0557 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 2.07% probability of exploitation in the next 30 days.

How do I fix CVE-2019-0557?

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-2019-0557?

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

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Source: NVD / NIST