VulnerabilityModified

CVE-2020-1023

A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package.

HIGH 8.8EPSS 3.72%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account. Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint. The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.

CVSS 3.1: 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 3.72% probability · 89th percentile
CISA KEV: Not listed
Weakness: CWE-434
Affected: microsoft/sharepoint enterprise server · microsoft/sharepoint foundation · microsoft/sharepoint server
Source: secure@microsoft.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.