CVE-2020-0656 Cross-site scripting in Dynamics 365 Field Service (on-premises) v7 series

Medium 5.4 Published 14 Jan 2020 Updated 4 Aug 2024

An attacker can execute arbitrary scripts in the context of a user's browser via a crafted web request in Microsoft Dynamics 365 Field Service.

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-2020-0656?

CVE-2020-0656 is a medium-severity cross-site scripting vulnerability in Microsoft Dynamics 365, published on 14 Jan 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server, aka 'Microsoft Dynamics 365 (On-Premise) Cross Site Scripting Vulnerability'.

Weakness: CWE-79

Which versions are affected by CVE-2020-0656?

It affects 1 product.

Products include Microsoft Dynamics 365.

How do I fix CVE-2020-0656?

No fix has been published for CVE-2020-0656 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-2020-0656 being exploited?

There is no known exploitation of CVE-2020-0656 in the wild and no public exploit code.

All Microsoft Dynamics 365 vulnerabilities

Sources

Also known as GHSA-gm78-546w-wxp9.