# CVE-2020-1103: Microsoft SharePoint Information Disclosure Vulnerability

CVE-2020-1103 is fixed in 3 products on 1 platform, first by KB4484336, released May 12, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1103
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0221
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: May 12, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1103

## Description

<p>An information disclosure vulnerability exists where certain modes of the search function in Microsoft SharePoint Server are vulnerable to cross-site search attacks (a variant of cross-site request forgery, CSRF).</p> <p>When users are simultaneously logged in to Microsoft SharePoint Server and visit a malicious web page, the attacker can, through standard browser functionality, induce the browser to invoke search queries as the logged in user.  While the attacker can’t access the search results or documents as such, the attacker can determine whether the query did return results or not, and thus by issuing targeted queries discover facts about documents that are searchable for the logged-in user.</p> <p>The security update addresses the vulnerability by running the search queries in a way that doesn’t expose them to this browser vulnerability.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB4484336](https://patchblox.com/security/data/fix/microsoft/kb4484336.md) | May 12, 2020 |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 |  | [KB4484364](https://patchblox.com/security/data/fix/microsoft/kb4484364.md) | May 12, 2020 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB4484332](https://patchblox.com/security/data/fix/microsoft/kb4484332.md) | May 12, 2020 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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