CVE-2021-40457 Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability

High 7.4 Published 13 Oct 2021 Updated 4 Aug 2024

An attacker can inject malicious scripts into Microsoft Dynamics 365 Customer Engagement, potentially executing code or stealing user sessions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-40457?

CVE-2021-40457 is a high-severity cross-site scripting vulnerability in Microsoft Dynamics 365, published on 13 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability

Weakness: CWE-79

Which versions are affected by CVE-2021-40457?

It affects 1 product.

Products include Microsoft Dynamics 365.

How do I fix CVE-2021-40457?

No fix has been published for CVE-2021-40457 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-2021-40457 being exploited?

There is no known exploitation of CVE-2021-40457 in the wild and no public exploit code.

All Microsoft Dynamics 365 vulnerabilities

Sources

Also known as GHSA-q8m2-7cfj-gxf6.