CVE-2020-1103 Microsoft SharePoint Information Disclosure Vulnerability
Attackers can exploit cross-site search flaws in SharePoint to infer document existence for logged-in users via malicious web pages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-1103?
CVE-2020-1103 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server, published on 21 May 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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). 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. The security update addresses the vulnerability by running the search queries in a way that doesn’t expose them to this browser vulnerability.
Weakness: CWE-352
Which versions are affected by CVE-2020-1103?
It affects 3 products.
Products include Microsoft Sharepoint Enterprise Server, Microsoft Sharepoint Foundation, Microsoft Sharepoint Server.
How do I fix CVE-2020-1103?
No fix has been published for CVE-2020-1103 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-1103 being exploited?
There is no known exploitation of CVE-2020-1103 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Sharepoint Enterprise Server
- CVE-2019-0604 Microsoft SharePoint Remote Code Execution
- CVE-2023-24955 Microsoft SharePoint Server Code Injection
- CVE-2025-49706 Microsoft SharePoint Improper Authentication
- CVE-2020-1210 Microsoft SharePoint Remote Code Execution Vulnerability
- CVE-2020-1595 Microsoft SharePoint Remote Code Execution Vulnerability
Sources
Also known as GHSA-88wv-c32x-w3h7.