Remote code execution in Microsoft SharePoint Server

1) Improper access control

EUVDB-ID: #VU72229

Risk: Medium

CVSSv4.0: 6.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-21717

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to compromise the affected system.

The vulnerability exists due to improper access restrictions. A remote user with Manage List permissions can bypass implemented security restrictions and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2013 - 2019

Microsoft SharePoint Server: 2013

CPE2.3

• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2013:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2016:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2019:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2013:*:*:*:*:*:*:*

External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21717

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.