May 2020: Microsoft SharePoint Information Disclosure Vulnerability
CVE-2020-1103 Published on May 21, 2020
Microsoft SharePoint Information Disclosure Vulnerability
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.
Products Associated with CVE-2020-1103
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Affected Versions
Microsoft SharePoint Enterprise Server 2016:- Version 16.0.0 and below publication is affected.
- Version 15.0.0 and below publication is affected.
- Version 16.0.0 and below publication is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.