# CVE-2020-1453: Microsoft SharePoint Remote Code Execution Vulnerability

CVE-2020-1453 is fixed in 5 products on 1 platform, first by KB4484515, released September 8, 2020. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2020-1453
- Priority: Urgent
- CVSS: 8.6 (Critical)
- EPSS: 0.0215
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Sep 8, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1453

## Description

<p>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.</p> <p>Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.</p> <p>The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB4484515](https://patchblox.com/security/data/fix/microsoft/kb4484515.md) | Sep 8, 2020 |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB4484506](https://patchblox.com/security/data/fix/microsoft/kb4484506.md) | Sep 8, 2020 |
| Microsoft | Microsoft SharePoint Foundation 2010 Service Pack 2 |  | [KB4486667](https://patchblox.com/security/data/fix/microsoft/kb4486667.md) | Sep 8, 2020 |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 |  | [KB4484525](https://patchblox.com/security/data/fix/microsoft/kb4484525.md) | Sep 8, 2020 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB4484505](https://patchblox.com/security/data/fix/microsoft/kb4484505.md) | Sep 8, 2020 |

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