Vulnerability record · CVE-2018-8426 · published 13 September 2018

CVE-2018-8426: Microsoft sharepoint enterprise server 2013 cross-site scripting vulnerability

Microsoft · Sharepoint Enterprise Server 2013

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.

5.4 CVSS 3.0 Medium EPSS 2.3% · top 17.8% CWE-79 · Cross-site scripting

5.4CVSS 3.0 base score, v2 3.5

2.3%EPSS exploitation probability, 30 days

NoNot in CISA KEV

3Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

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

Sharepoint Enterprise Server 2013 Microsoft

Sharepoint Enterprise Server 2016 Microsoft

Sharepoint Server 2010 Microsoft

References

Link	Tags
http://www.securityfocus.com/bid/105208	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041640	Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8426	PatchVendor Advisory
http://www.securityfocus.com/bid/105208	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041640	Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8426	PatchVendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2018-8426), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.