CVE-2020-1103
MediumCVSS 6.5Exploitation Probability (EPSS)
High risk85th percentile - higher than 85% of all known CVEs
Summary
An information disclosure vulnerability in Microsoft SharePoint Server where certain search function modes are vulnerable to cross-site search attacks (a CSRF variant). When users are logged in and visit a malicious page, the attacker can invoke search queries as the user, determining whether queries return results, thus discovering facts about searchable documents.
Risk Assessment
An attacker can gain information about document contents in SharePoint, compromising data confidentiality.
Recommendation
Install the security update that changes how search queries are executed to avoid exposure to this vulnerability.
Other vulnerabilities in Microsoft SharePoint Server
See all- CVE-2017-8569High
Microsoft SharePoint Server has an elevation of privilege vulnerability due to improper sanitization of a specially crafted web request to an affected SharePoint server.
- CVE-2025-53770CriticalActively exploited
Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware of an exploit in the wild and is preparing an update.
- CVE-2023-33160High
A vulnerability in Microsoft SharePoint Server allows remote code execution by an attacker. Exploiting this flaw could lead to system takeover.
- CVE-2021-34467High
Vulnerability in Microsoft SharePoint Server allows remote code execution. An attacker could exploit it to run arbitrary code on the SharePoint server.
- CVE-2021-34519Medium
Information disclosure vulnerability in Microsoft SharePoint Server. An attacker could exploit this flaw to gain access to information that should be protected.
- CVE-2021-27076High
Remote Code Execution vulnerability in Microsoft SharePoint Server. Details are not provided in the description.
- CVE-2020-1069High
A remote code execution vulnerability in Microsoft SharePoint Server due to failure to properly identify and filter unsafe ASP.Net web controls. An authenticated attacker could exploit it by creating a specially crafted page. The update corrects how SharePoint Server handles processing of created content.
- CVE-2023-36894Medium
A vulnerability in Microsoft SharePoint Server allows for information disclosure, potentially leading to unauthorized access to sensitive data.
- CVE-2023-36892High
A vulnerability in Microsoft SharePoint Server allows for spoofing, which may lead to unauthorized access to user data. An attacker can exploit this flaw to impersonate a trusted source.
- CVE-2023-36891High
A vulnerability in Microsoft SharePoint Server allows for spoofing, potentially leading to unauthorized access to user data. An attacker could exploit this flaw to impersonate a trusted source.
Original NVD description (English source)
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.