CVE-2018-0869 Cross-site scripting in SharePoint Server

Medium 5.4 Published Updated

An attacker can exploit improper web request handling in SharePoint Server to execute arbitrary code and escalate privileges.

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-2018-0869?

CVE-2018-0869 is a medium-severity cross-site scripting vulnerability in Microsoft Sharepoint Enterprise Server, published on 15 Feb 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

SharePoint Server 2016 allows an elevation of privilege vulnerability due to how web requests are handled, aka "Microsoft SharePoint Elevation of Privilege Vulnerability".

Weakness: CWE-79

Which versions are affected by CVE-2018-0869?

It affects 1 product.

Products include Microsoft Sharepoint Enterprise Server.

How do I fix CVE-2018-0869?

No fix has been published for CVE-2018-0869 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2018-0869 being exploited?

There is no known exploitation of CVE-2018-0869 in the wild and no public exploit code.

All Microsoft Sharepoint Enterprise Server vulnerabilities

Sources

Also known as GHSA-rgxx-qm2j-46fq.

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