CVE-2023-4479 Stored XSS Vulnerability in M-Files Web

High 7.3 Published 4 Mar 2024 Updated 23 Feb 2026

An attacker can execute arbitrary scripts in users' browsers by storing malicious HTML documents in M-Files Web.

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-2023-4479?

CVE-2023-4479 is a high-severity cross-site scripting vulnerability in M-Files Web, published on 4 Mar 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Stored XSS Vulnerability in M-Files Web versions before 23.8 allows attacker to execute script on users browser via stored HTML document within limited time period.

Weakness: CWE-79

Which versions are affected by CVE-2023-4479?

It affects 1 product.

Products include M-Files M-Files.

How do I fix CVE-2023-4479?

No fix has been published for CVE-2023-4479 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-2023-4479 being exploited?

There is no known exploitation of CVE-2023-4479 in the wild and no public exploit code.

Sources

Also known as GHSA-r32c-fmcr-34r3.