CVE-2020-16952

HIGH NUCLEI

Microsoft SharePoint Server-Side Include and ViewState RCE

Title source: metasploit
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-16952. PoCs published by mr_me, wvu, including Metasploit module exploits/windows/http/sharepoint_ssi_viewstate. A Nuclei detection template is also available.

AI-analyzed exploit summary This Metasploit module exploits CVE-2020-16952, a server-side include (SSI) vulnerability in Microsoft SharePoint to leak the web.config file and forge a malicious ViewState for remote code execution. It requires authentication and targets specific SharePoint versions.

Description

<p>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.</p> <p>Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.</p> <p>The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.</p>

Exploits (1)

metasploit WORKING POC EXCELLENT
by mr_me, wvu · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sharepoint_ssi_viewstate.rb

This Metasploit module exploits CVE-2020-16952, a server-side include (SSI) vulnerability in Microsoft SharePoint to leak the web.config file and forge a malicious ViewState for remote code execution. It requires authentication and targets specific SharePoint versions.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft SharePoint 2013, 2016, 2019
Auth required
Prerequisites: Authenticated SharePoint user with page creation privileges · Target SharePoint version within vulnerable build range
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

Microsoft SharePoint - Remote Code Execution
HIGHby dwisiswant0

References (2)

Core 2

Scores

CVSS v3 8.6
EPSS 0.7098
EPSS Percentile 99.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Details

CWE
CWE-346
Status published
Products (3)
microsoft/sharepoint_enterprise_server 2016
microsoft/sharepoint_foundation 2013 sp1
microsoft/sharepoint_server 2019
Published Oct 16, 2020
Tracked Since Feb 18, 2026