CVE-2020-1103: microsoft microsoft sharepoint enterprise server 2016 Cross-Site Request Forgery (CSRF)

Vulnerability summary

CVE-2020-1103 is a medium (CVSS 6.5) Cross-Site Request Forgery (CSRF) vulnerability in microsoft microsoft sharepoint enterprise server 2016. EPSS estimates a 2.21% chance of exploitation in the next 30 days, higher than 82.3% of scored vulnerabilities.

Timeline

1. 21-05-2020
   PublishedVulnerability first disclosed.
2. 19-08-2026
   Last modifiedVulnerability information updated.

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.

• CWE-352Cross-Site Request Forgery (CSRF)The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.