CVE-2026-34497 FMS Employee Vulnerable to HTML Injection
An attacker can inject malicious HTML scripts into the FM Systems Employee web application, potentially executing code or stealing user sessions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-34497?
CVE-2026-34497 is a medium-severity cross-site scripting vulnerability in Johnson Controls FM Systems Employee, published on 31 Jul 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in Johnson Controls FM Systems Employee allows Cross-Site Scripting (XSS).
This issue affects FM Systems Employee: before 2025.3.1.
Weakness: CWE-80
Which versions are affected by CVE-2026-34497?
It affects 1 product.
Products include Johnsoncontrols Fms Employee.
How do I fix CVE-2026-34497?
No fix has been published for CVE-2026-34497 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-2026-34497 being exploited?
There is no known exploitation of CVE-2026-34497 in the wild and no public exploit code.
Other vulnerabilities in Johnson Controls FM Systems Employee
Sources
Also known as GHSA-9hxq-5m48-2w2f.