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Vulnerability record · CVE-2019-0558 · published 8 January 2019

CVE-2019-0558: Microsoft business productivity servers cross-site scripting vulnerability

Microsoft · Business Productivity Servers

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 Server, Microsoft SharePoint, Microsoft Business Productivity Servers. This CVE ID is unique from CVE-2019-0556, CVE-2019-0557.

5.4 CVSS 3.1 Medium EPSS 2.0% · top 19.9% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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 Server, Microsoft SharePoint, Microsoft Business Productivity Servers. This CVE ID is unique from CVE-2019-0556, CVE-2019-0557.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/106389 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0558 PatchVendor Advisory
http://www.securityfocus.com/bid/106389 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0558 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-58644Microsoft SharePoint deserialization flaw allows remote code executionMicrosoft SharePoint Server deserializes untrusted data, letting an unauthenticated network attacker execute code. The flaw is rated CVSS 9.8 critica…KEVEPSS 16%analysed9.8CVE-2026-56164Microsoft SharePoint Server missing authentication allows privilege elevationMicrosoft Office SharePoint Server contains a missing authentication flaw in a critical function (CWE-306), letting an unauthenticated attacker reach…KEVEPSS 1.0%analysed9.8CVE-2026-50522Microsoft SharePoint deserialization flaw allows remote code executionMicrosoft SharePoint Server deserializes untrusted data, letting an unauthorized attacker run code over the network. The flaw is remotely reachable w…KEVEPSS 3.0%analysed9.8CVE-2026-20963Microsoft SharePoint deserialization flaw allows remote code executionMicrosoft SharePoint Server deserializes untrusted data, letting an unauthorized attacker run code over the network. The flaw is remotely reachable w…KEVEPSS 30%analysed9.8CVE-2025-53770Microsoft SharePoint Server deserialization RCE under active exploitationOn-premises Microsoft SharePoint Server deserializes untrusted data, letting an unauthenticated network attacker run code on the server. Microsoft st…KEVEPSS 100%analysed9.8CVE-2023-29357Microsoft SharePoint Server elevation of privilege via authentication bypassCVE-2023-29357 is a critical elevation of privilege flaw in Microsoft SharePoint Server. The CVSS vector shows it is network reachable with no privil…KEVEPSS 100%analysed9.8CVE-2019-0604Microsoft SharePoint application package markup validation RCEMicrosoft SharePoint fails to validate the source markup of an application package, allowing crafted packages to execute code on the server. This is …KEVEPSS 100%analysed9.1CVE-2026-55040Microsoft SharePoint weak authentication allows network security feature bypassMicrosoft SharePoint Server contains a weak authentication flaw (CWE-1390) that lets an unauthorized attacker bypass a security feature over the netw…KEVEPSS 70%analysed

Source: NIST National Vulnerability Database (record CVE-2019-0558), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.