CVE-2021-31950 Microsoft SharePoint Server Spoofing Vulnerability
An attacker can exploit a Server-Side Request Forgery flaw in Microsoft SharePoint to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-31950?
CVE-2021-31950 is a high-severity server-side request forgery vulnerability in Microsoft Sharepoint Foundation, published on 8 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Microsoft SharePoint Server Spoofing Vulnerability
Weakness: CWE-918
Which versions are affected by CVE-2021-31950?
It affects 2 products.
Products include Microsoft Sharepoint Foundation, Microsoft Sharepoint Server.
How do I fix CVE-2021-31950?
No fix has been published for CVE-2021-31950 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2021-31950 being exploited?
There is no known exploitation of CVE-2021-31950 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Microsoft Sharepoint Foundation
- CVE-2014-2816 Privilege escalation in n/a
- CVE-2023-21742 Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVE-2023-21744 Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVE-2022-44690 Microsoft SharePoint Server Remote Code Execution Vulnerability
- CVE-2022-41036 Microsoft SharePoint Server Remote Code Execution Vulnerability
Sources
Also known as GHSA-xqq4-7jq4-8rv5.