What’s Vulnerable › Vulnerabilities

CVE-2019-1202: SharePoint Information Disclosure Vulnerability

• Severity: medium (CVSS 4.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-14 · updated 2026-06-17
• Weakness: CWE-200

Description

An information disclosure vulnerability exists in the way Microsoft SharePoint handles session objects. An authenticated attacker who successfully exploited the vulnerability could hijack the session of another user. To exploit this vulnerability, the attacker could run a specially crafted application. The security update corrects how SharePoint handles session objects to prevent user session hijacking.

Affected products

• Microsoft SharePoint Server: 2016
• Microsoft SharePoint Foundation 2013 Service Pack 1: 2010-sp2, 2013-sp1
• Microsoft SharePoint Server: 2019
• Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before publication — fixed in publication
• Microsoft SharePoint Foundation 2013 Service Pack 1: from 13.0.0 before publication — fixed in publication
• Microsoft SharePoint Server: from 16.0.0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Sharepoint Enterprise Server 2016 publication; Microsoft SharePoint Foundation 2013 Service Pack 1 publication; Microsoft SharePoint Server publication. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1202
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1202

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