A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.

According to its self-reported version number, the Microsoft SharePoint application running on the remote host is affected by multiple vulnerabilities :

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

- A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server.

- A remote code execution vulnerability exists in Microsoft SharePoint Server when it fails to properly identify and filter unsafe ASP.

- 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).

- A spoofing vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft SharePoint Server installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities :

  - A cross-site-scripting (XSS) vulnerability exists when     Microsoft SharePoint Server does not properly sanitize a     specially crafted web request to an affected SharePoint     server. An authenticated attacker could exploit the     vulnerability by sending a specially crafted request to     an affected SharePoint server. The attacker who     successfully exploited the vulnerability could then     perform cross-site scripting attacks on affected systems     and run script in the security context of the current     user. The attacks could allow the attacker to read     content that the attacker is not authorized to read, use     the victim's identity to take actions on the SharePoint     site on behalf of the user, such as change permissions     and delete content, and inject malicious content in the     browser of the user. The security update addresses the     vulnerability by helping to ensure that SharePoint     Server properly sanitizes web requests. (CVE-2020-1099,     CVE-2020-1100, CVE-2020-1101, CVE-2020-1106)

  - 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 cant 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 doesnt expose     them to this browser vulnerability. (CVE-2020-1103)

  - 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. (CVE-2020-1023, CVE-2020-1024,     CVE-2020-1102)

  - A spoofing vulnerability exists when Microsoft     SharePoint Server does not properly sanitize a specially     crafted web request to an affected SharePoint server. An     authenticated attacker could exploit the vulnerability     by sending a specially crafted request to an affected     SharePoint server. The attacker who successfully     exploited the vulnerability could then perform cross-     site scripting attacks on affected systems and run     script in the security context of the current user.
    These attacks could allow the attacker to read content     that the attacker is not authorized to read, use the     victim's identity to take actions on the SharePoint site     on behalf of the user, such as change permissions and     delete content, and inject malicious content in the     browser of the user. The security update addresses the     vulnerability by helping to ensure that SharePoint     Server properly sanitizes web requests. (CVE-2020-1104,     CVE-2020-1105, CVE-2020-1107)

  - A remote code execution vulnerability exists in     Microsoft SharePoint Server when it fails to properly     identify and filter unsafe ASP.Net web controls. An     authenticated attacker who successfully exploited the     vulnerability could use a specially crafted page to     perform actions in the security context of the     SharePoint application pool process.  (CVE-2020-1069)

ID	Name	Product	Family	Type	Severity
112451	Microsoft SharePoint Server 2013 < 15.0.5241.1000 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
112450	Microsoft SharePoint Server 2019 < 16.0.10359.20000 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
112449	Microsoft SharePoint Server 2016 < 16.0.5005.1000 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
136514	Security Updates for Microsoft SharePoint Server (May 2020)	Nessus	Windows : Microsoft Bulletins	Local	high

Detections

Analytics

CVE-2020-1106

medium

Tenable Plugins

high

high

high

high