CVE-2025-27379 Stored Cross-Site Scripting in AES BOM Viewer

Medium 6.8 Published 22 Jan 2026 Updated 22 Jan 2026

An authenticated attacker can inject JavaScript into schematic descriptions, leading to code execution when viewed in the BOM Viewer.

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-2025-27379?

CVE-2025-27379 is a medium-severity cross-site scripting vulnerability in Altium AES, published on 22 Jan 2026. 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 stored cross-site scripting (XSS) vulnerability in the BOM Viewer in Altium AES 7.0.3 allows an authenticated attacker to inject arbitrary JavaScript into the Description field of a schematic, which is executed when the BOM Viewer renders the affected content.

Weakness: CWE-79

Which versions are affected by CVE-2025-27379?

It affects 1 product.

Products include Altium On-Prem Enterprise Server.

How do I fix CVE-2025-27379?

No fix has been published for CVE-2025-27379 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-2025-27379 being exploited?

There is no known exploitation of CVE-2025-27379 in the wild and no public exploit code.

Sources

Also known as GHSA-w5qj-7xqm-q39c.