Security Updates for Microsoft SharePoint Server 2013 (December 2021)

high Nessus Plugin ID 158167


The Microsoft SharePoint Server 2013 installation on the remote host is missing a security update.


The Microsoft SharePoint Server 2013 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-43242)

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-42294, CVE-2021-42309)


Microsoft has released the following security updates to address this issue:

See Also

Plugin Details

Severity: High

ID: 158167

File Name: smb_nt_ms21_dec_office_sharepoint_2013.nasl

Version: 1.2

Type: local

Agent: windows

Published: 2/18/2022

Updated: 2/22/2022

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-42309


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:sharepoint_server, cpe:/a:microsoft:sharepoint_foundation

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2021

Vulnerability Publication Date: 12/14/2021

Reference Information

CVE: CVE-2021-42294, CVE-2021-42309, CVE-2021-43242

MSKB: 5002008, 5002071, 5002015

MSFT: MS21-5002008, MS21-5002071, MS21-5002015